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Operators Manual

In a world of compromise, some don’t.

HK UMP

Submachine Gun

UMP45 (.45 ACP)

UMP40 (.40 S&W)

UMP

Universal Submachine Gun

Operators Manual

CAUTION: Read the safety rules before handling the

UMP Submachine Gun!

HK, Inc., 21480 Pacific Blvd.

Sterling, Virginia 20166-8903

United States of America

Telephone (703) 450-1900 • Fax (703) 450-8160

www.hecklerkoch-usa.com

Specifications and models subject to change without notice.

.45 ACP

.40 S&W

TABLE OF CONTENTS

Safety Rules on the Use of the HK UMP Submachine Gun ................6

General ................................................................................................8

Assembly Groups................................................................................10

Description of Assembly Groups ........................................................11

Assembly Group 1 Upper Receiver with barrel, folding buttstock

and attachment components ............................11

Assembly Group 2 Bolt Group ..........................................................12

Assembly Group 3 Lower Receiver with trigger mechanism ............14

Assembly Group 4 Magazine ............................................................16

Accessories ........................................................................................17

Carrying Sling......................................................................................17

Cleaning Kit ........................................................................................17

Special-purpose Accessories ..............................................................17

Sound Suppressor ..............................................................................17

Mounting Rails for Aiming Devices according to MIL-STD-1913 ........17

Handstop ............................................................................................17

Magazine Loader ..............................................................................18

Handling and Operation ....................................................................18

Filling the Magazine ..........................................................................18

Filling the Magazine using the Magazine Loader ..............................18

Emptying the Magazine ......................................................................19

Insertion and Removal of the Magazine ............................................19

Loading the Submachine Gun ..........................................................20

Forward Assist ....................................................................................22

Storage of the Weapon ......................................................................23

Disassembly of the UMP ....................................................................24

Safety Check ......................................................................................24

Disassembly into Assembly Groups ..................................................24

Disassembly and Assembly of the Bolt Group....................................26

Disassembly and Assembly of the Magazine ....................................27

Reassembly of the UMP ....................................................................28

Function Check ..................................................................................29

Operator Cleaning ..............................................................................30

Normal Cleaning ..............................................................................31

TABLE OF CONTENTS

Major Cleaning ..................................................................................33

Operator Inspection ............................................................................34

Lubrication ..........................................................................................34

Special Use and Maintenance of HK Sound Suppressed Weapons ..35

UMP with Quick Connect Sound Suppressor ....................................36

Ammunition ........................................................................................38

Stoppages ..........................................................................................38

Troubleshooting Guide ......................................................................39

Carrying Sling ....................................................................................41

Carrying Modes ..................................................................................43

Firing Positions ..................................................................................44

Sight Alignment for the UMP ..............................................................45

Specifications ......................................................................................47

Exploded Diagram and Parts List ......................................................48

Weapon Service Record ....................................................................50

UMP SAFETY RULES

Safety Rules on the use of the HK UMP Submachine Gun

Clear the weapon! Before handling the weapon, “clear it!” Do so

by:

• Make sure fingers are outside of the trigger guard and the

weapon is pointed in a safe direction at all times!

• ON SAFE – Rotate the safety/selector lever to the “Safe”

position. (With the safety/selector lever set at the white box

with a white bullet symbol inside. See illustrations on page 12).

• REMOVE MAGAZINE – Depress the magazine release lever and

remove the magazine from the magazine well.

• COCKING LEVER – Rotate the ejection port towards the ground

and pull the cocking lever rearward one or more times to insure

the chamber is empty. Watch for a live round or empty case to

be ejected. Rotate the cocking lever upward slightly and lock it

into the indent in the cocking lever housing to lock the bolt

open.

• INSPECT CHAMBER – Inspect chamber for the presence of a

live round or empty case.

Visually – View chamber through open ejection port.

Physically – Insert index finger through magazine well or

ejection port and feel for the presence of a round or cartridge

case in the chamber.

Remove any live rounds or empty cases from the chamber or

from within the weapon or magazine before handling the

weapon further.

The HK UMP submachine gun is now considered “Clear”.

WARNINGS

• When handling submachine guns special caution is necessary

as the position and direction of the submachine gun can be

changed easily.

• Carefully read this operators manual before handling the

submachine gun.

• Only use the submachine gun after you have fully reviewed and

understand these instructions.

• Observe all notes on handling and operation. Failure to do so

may result in injury or death of the operator or bystanders.

• Do not use the submachine gun if you have previously ingested

alcohol, drugs or medication.

• When passing the submachine gun between persons, the

weapon must be clear and the bolt should be open.

• Always treat the submachine gun as if it were loaded and ready

UMP SAFETY RULES

to fire.

• Never point the submachine gun at anyone during handling.

• Always point the submachine gun in a safe direction.

• Before handling and before cleaning it has to be checked to

ensure that:

- The bolt is locked to the rear

- The submachine gun is unloaded (cartridge chamber empty)

- The barrel is free of obstructions

- The magazine is empty.

• Keep your finger off the trigger when loading, unloading or

otherwise handling the submachine gun. Always place the

trigger finger outside of the trigger guard.

• Place your finger on the trigger only when your sights are

aimed at the target.

• Never use force when handling, disassembling, cleaning and

assembling the submachine gun.

• Disassemble the submachine gun only as far as described in

this manual.

• A handstop is provided with each UMP to keep the nonfiring

hand or fingers away from the muzzle of the weapon. This

handstop should be used at all times and can be mounted on

the weapon with or without the mounting rails attached.

• Always wear eye protection when using the submachine gun.

• Always wear hearing protection when using the submachine

gun.

• Take into account the fact that bystanders are also endangered.

Ensure bystanders are also wearing ear and eye protection.

• Only use factory-loaded and undamaged cartridges of the

correct caliber.

• Always mind that the muzzle area is free of obstacles during

firing.

• Store the weapon and ammunition in separate places.

• Heckler & Koch does not assume liability for events due to

disregarding this manual, improper handling, negligence,

improper treatment, unauthorized exchange of parts or

manipulations of the submachine gun.

• Read this operators manual and be familiar with the safe

handling of this weapon before using it. Keep this manual with

the submachine gun.

UMP SUBMACHINE GUN

General

The UMP Submachine Gun is a select-fire small arm manufactured

according to the latest standards of manufacturing methods. The upper

receiver, lower receiver, magazine, and folding buttstock are made of

high strength polymer. The UMP allows single fire, limited bursts, or fully

automatic fire to be fired from all positions. The UMP is a simple

blowback operated weapon with fixed barrel.

The UMP offers maximum safety and accuracy as it fires from the

closed bolt position.The UMP is easily disassembled into its main

assembly groups for cleaning and care without the use of tools.

Accessories

The following accessories are available:

• sound suppressor

• mounting rails for aiming devices

• magazine loader

• handstop

• multi-purpose carrying sling

• tactical lights

Other accessories may also be available, please contact HK for more

information.

Fig. 1 UMP with buttstock open, left side view

GENERAL

Fig. 2 UMP with buttstock open, right side view

Fig. 3 UMP with buttstock folded, right side view

Fig. 4 UMP with carrying sling, left side view

UMP SUBMACHINE GUN

Assembly Groups

1 Upper receiver with barrel, folding buttstock and

attachment components

2 Bolt Group with recoil spring assembly, complete

3 Lower receiver with trigger mechanism, backplate and

magazine well

4 Magazine

For accessories see pages 15-16

Fig. 5 UMP Assembly Groups (4)

DESCRIPTION OF ASSEMBLY GROUPS

Assembly Group 1

Upper receiver with barrel, folding buttstock attachment

components

The upper receiver is produced using fiber-reinforced plastics and

houses other subassemblies. The inside of the upper receiver contains

metal guideways for the bolt group as well as attachment points for the

lower receiver with magazine well and backplate.

The barrel is inserted into and pinned to the upper receiver. The cocking

lever of the weapon is located above the barrel. It also serves to

manually lock the bolt in its open position. The right side of the upper

receiver contains the ejection port. The ejection port includes an integral

catch for engage-ment of the buttstock in its folded position.

The bottom part of the upper receiver includes the support bolts for the

lower receiver. The left side of the upper receiver includes eyebolts for

attachment of the carrying sling.

The sights are fastened to the top of the upper receiver. They consist of

a flip-up type rear sight with diopter (peep) and u-notch apertures as

well as of the front sight post with front sight hood. The rear of the upper

receiver includes the hinge for the folding buttstock.

Fig. 6 Upper Receiver with barrel, folding buttstock and attachment

components

1 Upper receiver 5 Flip-up rear sight

2 Barrel 6 Buttstock

3 Front sight 7 Buttstock release button

4 Cocking lever 8 Carrying sling attachment

points

UMP SUBMACHINE GUN

Buttstock

The buttstock folds to the right along the upper receiver, and with the

stock folded, the UMP is only 17.72 inches (450 mm) long. The open

frame-type design of the buttstock also enables the weapon to be fired

with the buttstock folded.

Pressing the catch releases the buttstock for folding. When folded, the

buttstock engages on the catch located on the forward part of the

ejection port. For unfolding, the buttstock is lifted off the catch.

The buttplate has a rubber pad to ensure non-slip contact with the

shoulder. This cheek piece is also rubber covered to enhance shooter

comfort during firing. In the forward part of the buttstock a hole is

provided for insertion of the locking pin during disassembly.

Fig. 7 Folding the buttstock Fig. 8 Unfolding the buttstock

Assembly Group 2 Bolt Group

The bolt group, together with the recoil spring assembly, is contained

inside the upper receiver. The reciprocal movement of the bolt group

provides for feeding and ignition of the cartridge, for extraction and

ejection of the spent case as well as for cocking of the hammer. The

right side of the bolt has a thumb recess for manual closing of the bolt

(forward assist).

The recoil spring assembly pushes the bolt forward into the firing

position The cone-shaped support for the recoil spring assembly is

housed in the backplate of the lower receiver. The longitudinally

movable guide ring supports itself within the bolt.

DESCRIPTION OF ASSEMBLY GROUPS

The bolt group (Fig. 8 and 9) consists of:

1 bolt

2 firing pin spring

3 firing pin

4 extractor

5 firing pin retaining pin

6 recoil spring assembly, complete

6a guide ring

6b support

Fig. 8 Bolt Group, assembled

Fig. 9 Bolt Group, disassembled

UMP SUBMACHINE GUN

Assembly Group 3

Lower receiver with trigger mechanism

The lower receiver houses the trigger mechanism with safety/selector

levers, the backplate, the magazine well, magazine release lever and

bolt catch. The forward portion of the lower receiver is hooked to the

upper receiver. The rear portion is fastened to the upper receiver using a

removable locking pin.

The safety/selector levers are fitted on both sides of the pistol grip.

The forward portion of the lower receiver has lugs for attachment to the

upper receiver. Behind these lugs is the magazine well with the

magazine release lever.

Above the magazine release lever is the bolt catch. It serves to hold the

bolt rearward when the last round is fired and to release the bolt from

the open position after an empty magazine has been replaced with a

loaded magazine.The rear side of the lower receiver includes the

integrated backplate with buffer and support for the recoil spring

assembly.

The safety/selector lever of the "Navy" trigger mechanism has three

positions :

Position = Safe

Position = Semi Automatic fire

Position = Fully Automatic fire

Trigger Mechanism Variants

Trigger mechanism for single fire, 2-round burst and fully automatic fire.

The safety/selector lever has four positions :

Position = Safe

Position = Semi Automatic fire

Position = 2-round burst

Position = Fully automatic fire

NOTE: UMP trigger mechanisms with various combinations of the

above firing modes and possibly others may also be available for the

UMP Submachine gun.

DESCRIPTION OF ASSEMBLY GROUPS

Fig. 10 Lower receiver with trigger mechanism,

backplate and magazine well

1 Trigger 7 Trigger mechanism

2 Magazine release lever 8 Backplate

3 Magazine well 9 Buffer

4 Attachment lugs 10 Support for recoil spring

5 Bolt catch 11 Safety/Selector lever

6 Release lever 12 Trigger guard

safe semi-automatic fire fully automatic fire

Fig. 11a, 11b, 11c Positions of the safety/selector lever for safe,

single fire, and fully automatic fire

safe semi-auto. fire 2-round burst fully automatic fire

Fig. 11d, 11e, 11f, 11g Pistol grip with trigger mechanism for safe,

single fire, 2-round burst, and fully automatic fire

UMP SUBMACHINE GUN

Assembly Group 4

Magazine

The magazine housing is constructed from plastic. The transparent

panels on the magazine enables its contents to be checked visually.

The magazine consists of: magazine housing, magazine floor plate,

follower, follower spring and locking plate.

Fig. 12 Magazine, complete Fig. 13 Magazine, disassembled

1 Magazine housing

2 Magazine floor plate

3 Follower

4 Follower spring

5 Locking plate

ACCESSORIES

Carrying sling

The carrying sling (Fig.14) enables the shooter

to carry the UMP in any of several ways and

ensures immediate readiness to fire from all

carrying positions (see pages 43-44).

Fig. 14 Carrying slingt

Cleaning Kit

The cleaning kit includes:

1 Transport case 5 Oil bottle

2 Cleaning patches 6 Bore brush

3 Cleaning brush 7 Patch holder

4 Cleaning rod with folding handle

Fig. 15 Cleaning Kit

Bruegger & Thomet

Quick Connect Sound Suppressor

To mount the suppressor, the locking lever

is depressed, the suppressor is placed over

the muzzle, and the locking lever released.

Gas pressure at the muzzle is dissipated

within the suppressor’s chamber system.

This considerably reduces muzzle blast.

Mounting rails (MIL-STD-1913)

for aiming devices

The mounting rail (Picatinny

Rail) is screwed onto the

molded-in hard points provided

either on top of the receiver,

below the forearm or on the right

or left sides of the forearm.

Hand Stop

The hand stop prevents the shooter’s

hand from slipping over the muzzle. It is

screwed to the lower mounting rail on the

lower side of the forearm using a long

screw or directly to the forearm support

without a mounting rail with a short screw.

Fig. 16 Sound Suppressor

Fig. 17 Mounting rails

for aiming devices

Fig. 18 Hand Stop

HANDLING & OPERATION OF THE UMP

Magazine Loader

The magazine loader aids in the filling of magazines.

Fig. 19 Magazine Loader

Filling the Magazine

• Grasp magazine.

• Slide individual cartridges under the magazine lips one by one (Fig. 20).

• Repeat this process until the required number of cartridges has been

inserted or the magazine is full.

Fig. 20 Filling the magazine

NOTE: Loading more than the prescribed number or rounds (i.e. 25

cartridges in a 25-round magazine) will prevent the magazine from

being inserted in the weapon with the bolt forward.

Filling the Magazine using the Magazine Loader

• Place the magazine loader onto the magazine, depress and hold.

• Slide individual cartridge (base first) under the magazine lips (Fig. 21).

• Release the magazine loader, fully seat the cartridge.

• Repeat this process until the required number of cartridges has been

filled in.

Fig. 20 Filling the magazine using a magazine loader

MAGAZINE

Emptying the Magazine

• Grasp magazine.

• With your thumb, push cartridges forward out of the magazine into

the palm of the other hand

• Grasp magazine and hold it with the points of the bullets pointing

towards the bottom.

• Use a piece of wood to slide the cartridges out of the magazine.

Insertion and removal of magazine

• Put the UMP on (Safe).

• Insert magazine into the magazine well (Fig. 22). The magazine catch

has to engage audibly in the process. Tug on the magazine to ensure

it is fully engaged.

• For removal of the magazine, push magazine catch forward (Fig.23)

and remove magazine downward.

Fig. 22 Insert magazine Fig. 23 Remove magazine

UMP SUBMACHINE GUN

Starting Situation 1: No magazine is present in the weapon. The bolt

is forward.

• Put the UMP on (Safe).

• Insert the loaded magazine into the magazine well until the magazine

catch engages audibly. Tug downward to ensure it is properly seated.

• The UMP is partially loaded and with the safety on.

• Pull cocking lever backwards as far as it will go and let bolt snap back

to its forward position. In the process do not ride the cocking lever

forward. or

• Pull cocking lever backwards as far as it will go, (Fig. 24 ) and swivel

it upwards (engage it in the indent) into the open position.

• Insert the loaded magazine into the magazine well until the magazine

catch engages audibly. Tug to check.

• With the open palm of the non-firing hand "slap" the cocking lever

downward and forward to chamber a round. During this process do

not ride the cocking lever forwards.

The UMP is now fully loaded and with the safety on.

FIg. 24 Pull cocking lever backwards

LOADING THE SUBMACHINE GUN

Starting Situation 2: There is an empty magazine in the weapon.

The bolt is held back by the bolt catch.

• Put the UMP on (Safe).

• Push magazine catch forward and remove empty magazine.

• Insert the filled magazine into the magazine well until the magazine

catch engages audibly. Tug to check.

• Depress upper end of bolt catch (Fig. 25), thus releasing the bolt and

allowing it to snap forwards.

• The UMP is now fully loaded and with the safety on.

FIg. 25 Depress bolt catch to release the bolt

FORWARD ASSIST

With heavy external fouling of the UMP, (sand, sludge) or to load the

weapon quietly, the thumb recess on the bolt may be used as a forward

assist (Fig 25A). To do so use the thumb recess, push bolt forwards

until it is in the forward most position.

FIg. 25A Forward Assist

STORAGE OF THE WEAPON

1. Store the weapon clean and lubricated.

2. Store the weapon without a round in the chamber.

3. Store the weapon with the cocking lever forward and the hammer

down (at rest).

4. After no more than twelve (12) months unload all loaded magazines

and replace the ammunition with fresh ammunition.

5. Clean and lubricate the weapon and magazines every twelve (12)

months while in storage.

6. Store the weapon is a clean, dry environment with regulated

temperature controls.

UMP SUBMACHINE GUN

Disassembly of the UMP

NOTE: The UMP is disassembled and reassembled without the use

of tools. The use of force is prohibited. The user of this weapon is

not allowed to disassemble the weapon beyond that which is

covered in this operators manual. Such disassembly may only be

carried out by qualified maintenance personnel.

Safety check

• Put the UMP on “Safe”.

• Remove the magazine.

• Pull cocking lever backwards as far as it will go and engage it in the

indent in the cocking lever.

• Check to make sure the cartridge chamber is empty.

• Swivel cocking lever downward and allow the bolt to move forward.

Disassembly into assembly groups

• Detach carrying sling.

• Unfold buttstock.

• Pull out buttstock locking pin and store in the hole on the buttstock.

• Swivel lower receiver downward and detach (Fig. 26).

Fig. 26 Detaching lower receiver

CAUTION: When detaching the UMP lower receiver during

disassembly, ensure the lower receiver does not rotate more than

80° around the axis where the attachment lugs hook on to the

support bolts. Doing so will severely damage the attachment lugs.

attachment lugs

support bolts

DISASSEMBLY

• Fold buttstock.

• Pull back cocking lever and remove recoil spring assembly with bolt to

the rear (Fig. 27).

Fig. 27 Removing recoil spring assembly with bolt

UMP SUBMACHINE GUN

Disassembly of the Bolt

• Push and hold firing pin forward.

• Pull out firing pin retaining pin to the left (Fig. 28).

• Remove firing pin and firing pin spring to the rear. To do this, push

locking catch to the right (Fig. 29). With your thumb prevent the firing

pin with firing pin spring from springing out.

Fig. 28 Fig. 29

Pull out firing pin retaining pin Push locking catch to the right

WARNING: Never disassemble the firing pin. It is possible to

assemble the firing pin assembly incorrectly and in doing so,

disabling the UMP firing pin safety. Please contact HK for more

information.

Assembly of the Bolt

• Place firing pin spring onto firing pin.

• Insert firing pin spring and firing pin into the bolt from the rear and

push them forwards (Fig. 30).

• Using any pointed object push firing pin forwards (Fig. 31).

• Insert firing pin retaining pin from the left to retain firing pin in the bolt.

Fig. 30 Fig. 31

Insert firing pin spring Push firing pin forwards

and firing pin

locking

catch

DISASSEMBLY

Disassembly of the Magazine

• Depress locking plate through magazine floor plate and slide

magazine floor plate to the rear.

• Detach magazine floor plate to the rear.

• Remove follower spring with locking plate and follower.

CAUTION: Magazine floor plate is under spring tension. With your

thumb secure locking plate with follower spring to prevent it from

springing out.

Assembly of Magazine

• Insert follower and follower spring with locking plate into the

magazine housing from below.

• Fully depress follower spring and locking plate (Fig.29) and slide

magazine floor plate onto magazine housing from the rear.

• Push magazine floor plate forwards as far as it will go.

• Check that the floorplate is fully seated and secured in place by the

tab of the locking plate.

UMP SUBMACHINE GUN

Reassembly of the UMP

• Fold buttstock.

• Insert the bolt and recoil spring assembly to the receiver from the rear.

• Unfold buttstock.

• From below, engage lower receiver (hammer between cocked and

released positions) into the support bolts on the upper receiver and

swivel it upwards (Fig. 32).

• Insert locking pin into the upper receiver to secure lower receiver.

• Put the UMP on (Safe).

• Insert empty magazine.

• Carry out a function check as described on page 30 (cock, check bolt

catch function, set safety/selector lever on “Fire”, pull trigger, set

safety/selector lever to “Safe”).

• Attach carrying sling (Fig. 33).

Fig. 32 Fig. 33

Engage lower receiver Attaching carrying sling

support bolts

FUNCTION CHECK

NOTE: A Function Check should be performed anytime the weapon

is reassembled. This quick check indicates whether or not the

weapon has been properly assembled and/or assembled with all

components. A properly executed Function Check can also reveal

many of the more obvious malfunctions that could occur between

the interactive components of the weapon. ALWAYS clear the

weapon before performing the Function Check! ENSURE the

weapon is clear!

1. Clear the weapon.

2. Place the cocking lever and bolt group in the forward position.

3. With the weapon on “Safe”, pull the trigger. Hammer should not fall.

4. Place the weapon on “Semi-automatic”. Pull the trigger and hold the

trigger back. Hammer should fall.

5. Still holding the trigger back, recock the weapon. Release the trigger.

Listen for the “click” of the trigger and sear resetting. Pull the trigger.

Hammer should fall.

6. Place the weapon on “Burst”, if applicable. Recock the weapon. Pull

the trigger and hold the trigger back. Hammer should fall.

7. Still holding the trigger back, recock the weapon. Release the trigger.

You should not hear the hammer fall. (The hammer should already be

forward).

8. Place the weapon on “Fully-automatic”, if applicable. Recock the

weapon. Pull the trigger and hold the trigger back. Hammer should

fall.

9. Still holding the trigger back, recock the weapon. Release the trigger.

You should not hear the hammer fall. (Again, the hammer should

already be forward).

The Function Check is now complete.

UMP SUBMACHINE GUN

Operator Cleaning

• The functional performance of any mechanical device varies greatly

on the quality and frequency of the maintenance performed on that

item. Firearms are no exception. The operator spends most of the

time with the weapon and therefore has the best opportunity to

perform the necessary upkeep required to insure top performance at

all times.

• Metal components of new UMPs are coated in a thick, oily

preservative that should be removed prior to the weapon being used

or fired. This preservative oil, applied by HK personnel prior to the

shipment of the weapons from the manufacturing facility in Germany,

guarantees that the weapons and accessories will remain corrosion-

free during storage and transport. However, this preservative fluid is

not considered a lubricant and therefore should be removed and

replaced with a high-quality weapons lubricant whenever possible.

This preservative fluid attracts debris and dirt and possesses little or

no lubrication qualities.

• Cleaning the UMP, especially with its polymer construction, need not

take hours and a great deal of effort. With the right equipment a very

fouled UMP should be able to be thoroughly cleaned in less than 10

minutes. A solvent tank where the parts can be immersed in and

scrubbed will save a great deal of time and effort as will compressed

air to blow off the fouling and solvent or to spread the lubricant. There

are companies, such as Safety-Kleen, that sell or rent such solvent

tanks and will exchange the solvent on a regular basis at a

reasonable price.

NOTE: If using Ultra Sonic-type cleaning machines, do not immense

the painted portion of the UMP, specifically the color pictogram firing

mode markings on the lower receiver. Ultra sonic cleaning will

remove the markings!

• If such a set up is not available to you, a complete weapons cleaning

kit specially designed for the HK UMP will reduce your cleaning time

and make the job easier.

• Any quality weapons solvent or oil can be used to clean the UMP.

Basically, if it’s safe to put your bare hands into it won’t hurt the

surfaces of the weapon. Break-Free (CLP), Ballistol, Militec or any

of the other brand-name cleaners or lubricants specifically designed

for use with weapons will work well on the UMP.

• At HK we recommend two types of operator cleaning. Normal

cleaning and Major cleaning.

CLEANING

Normal cleaning

Performed after each firing or every twelve (12) months.

Major cleaning

Often referred to as “detailed cleaning”. Performed on an unsuppressed

UMP after 1,000 rounds (500 for a suppressed UMP) or when the

weapon is exposed to or excessively laden with sand, dust, water or

other visible contaminants or foreign matter.

• The cleaning intervals listed here are recommendations only!

• Your intervals between cleaning will vary greatly depending on many

factors to include the type of ammunition used, the environment in

which the weapon is used, and the thoroughness of your cleaning, etc.

Normal Cleaning

1. CLEAR THE WEAPON!

2. Disassemble the weapon into the major assembly groups.

Bruegger & Thomet Quick Connect Sound Suppressor Use a nylon

bristle toothbrush and rag or swab to remove all fouling from the

attachment area and locking lever of the sound suppressor. Tap the

sound suppressor lightly on a padded surface or blow it out with

compressed air to remove any loose fouling from inside the

suppressor body. (DO NOT immerse the sound suppressor in solvent

or insert any rods, brushes or patches into the sound suppressor

body! Wipe the outside of the sound suppressor off with a clean, oil-

free rag. Do not apply oil to the outside of the sound suppressor or it

will burn off during firing and obscure the operators view of the target.

Multi-purpose carrying sling The nylon webbing and plastic com-

ponents of the multi-purpose carrying sling can be cleaned using

warm soap, water, and a soft bristled brush. Allow the sling material to

dry completely before storage or use.

Buttstock Simply remove any foreign debris from the exterior polymer

and rubber surface of the buttstock using a toothbrush, rag, swabs or

compressed air when available.

Lower receiver Remove any foreign debris from the plastic pistol grip

using a tooth-brush, rag, swabs or compressed air. Scrub the top of

the hammer, ejector and the area around the front of the ejector and

release lever with a small amount of solvent or oil to break up the

carbon fouling. Remove the loose fouling and debris by rinsing the

components in the a solvent tank or by using rags, swabs, or

UMP SUBMACHINE GUN

compressed air.

Forearm / foregrip Remove any foreign debris from the forearm or

optional foregrip using a toothbrush, rag or compressed air.

Upper receiver with barrel Start with the bore and chamber.

•Bore – Apply a liberal amount of solvent to a bronze bristle bore

brush of the appropriate caliber. Always insert the bore brush from the

chamber end and push it all the way through the barrel in the direction

that the bullet travels. Pull the brush back through the barrel. DO NOT

allow the brush to stop in the bore or it may get stuck! Repeat this

in/out procedure for a minimum of three complete trips. Remove the

bore brush and let the solvent work in the bore for a few minutes

while you clean other components.

• Chamber – Apply a liberal amount of solvent to the appropriate bore

brush. Insert the brush through the back of the receiver into the

chamber. DO NOT push the brush past the chamber! Work the brush

back and forth in the chamber at least three times. Remove the brush

and let the solvent go to work on the fouling for a few minutes while

you work on other components.

•Chamber face – This area is easily tackled using the special

Chamber Face brush available in the HK Field Weapons Cleaning Kit

for the UMP submachine gun. Attach this brush to the cleaning rod

and lock the handle so that the rod and brush can be turned together.

Apply a liberal amount of solvent to the bristles of the brush. Insert the

brush through the back of the receiver until it makes contact with the

area surrounding the opening to the chamber and bore. With slight

inward pressure, rotate the brush in a clockwise direction to break up

the carbon fouling built-up on the face of the chamber. Continue this

procedure until you are satisfied with your efforts.

•Upper Receiver – Apply a few drops of solvent to a toothbrush and

scrub the area around the chamber face and along the length of the

receiver rails to break-up the carbon fouling.

•Muzzle and accessory attachment interface – Use a nylon bristle

toothbrush and a small amount of solvent to remove any fouling from

the muzzle where the sound suppressor and muzzle mounted

accessories attach. Remove all of the fouling, carbon, and visible

debris from the entire upper receiver using a solvent tank and

compressed air or swabs, patches, rags, etc. Run al least three clean

patches of the appropriate size all the way through the bore in the

direction of bullet travel to remove the loose fouling and solvent.

CLEANING

Bolt group

Scrub all parts of the bolt group with a toothbrush and solvent where

carbon is visible, especially around the face of the bolt and the

extractor. Do not attempt to remove the extractor for cleaning!

There is no functional need to remove the extractor for normal

cleaning. Remove the loose fouling from all parts using a rag, swabs

or compressed air.

Magazine Don’t forget the magazines! They are very important and very

often overlooked during cleaning. Many stoppages occur as a result of

improperly maintained magazines.

Apply a few drops of solvent to a toothbrush and scrub the top of the

magazine to remove any visible carbon fouling or loose debris. Pay

special attention to the front edge of the housing, feed lips, and the

follower.

Remove the solvent and loose fouling from the magazine using a rag,

swabs or compressed air.

Major Cleaning

As mentioned earlier, Major cleaning should be performed after 1,000

rounds are fired through an unsuppressed UMP or 500 rounds through a

suppressed UMP. Major cleaning is also performed when the weapon

has been immersed in water or is laden with large amounts of visible

foreign matter or fouling.

During Major cleaning, all weapon components except the sound

suppressor and the carrying sling, should be rinsed with or immersed in

solvent and scrubbed thoroughly with a brush. This includes the

magazine and it’s parts. The components can then be dried using a rag

or swabs, though compressed air is preferable for Major cleaning.

If any assembly groups require a more thorough cleaning, an “Ultra-

Sonic” cleaning machine can be used containing any solvent that it is

safe to place your bare hands in, as a general rule.

However, avoid placing painted surfaces such as the firing mode

markings on the lower receiver into an ultra-sonic cleaner, as this may

remove the colored markings. Further disassembly of any assembly

group(s) beyond the level described above must be performed by, or at

a minimum supervised by, an HK factory-trained armorer.

UMP SUBMACHINE GUN

Operator inspection

During or after cleaning the operator should inspect the weapon and it’s

components for any irregularities that may causes problems during it’s

operation. If any potential deficiencies are noted, they should be

corrected immediately and/or brought to the attention of the unit armorer.

In general, the operator should keep a watchful eye out for the following

discrepancies both in the weapon as a whole and in each assembly

group. • Improper function

• Missing parts

• Cosmetic flaws (cracks, dents, burrs, rust, etc.)

• Improper assembly

• Loss of spring tension (where applicable)

• Unusual looseness (where applicable)

• Cracked welds

• Excessive wear

• Absence of protective finish (where applicable)

• Absence of proper lubrication

Also check these more areas where problems may begin in the UMP.

Lubrication

Any type of high-quality, medium-weight lubricant (oil) specifically

designed for use on firearms such as Break-Free (C.L.P.) Ballistol, or

Militec will work well on the HK UMP submachine gun. DO NOT use

lubricants/cleaners that boast of their ability to penetrate metal (i.e.

WD-40, Tri-Flow, etc.) as these substances may deaden primers.

Where and how much?

No Lube – (surface is dry and not slippery to the touch)

• Sound suppressor body

• Sling

• Plastic components

Light Lube – (finger run across surface yields little or no lube)

• Bore and chamber

• All metal parts (except sound suppressor)

• Muzzle

• Magazine spring

• Axles of all operating controls (cocking lever, bolt

catch, safety/selector lever, magazine catch, etc.)

• Rear sight assembly

LUBRICATION

• All metal accessories

Medium Lube – (finger run across surface yields some lube but lube

does not run down surface when held in a vertical position)

• Bolt group with recoil spring and guide rod

Heavy Lube – (Lube runs down surface when held in a vertical

position) No heavy lube is required on the HK UMP!

• Reapply lubrication to the bolt of the UMP periodically during firing as

it burns off from the heat. Sound suppressed weapons generate more

smoke and noxious gases especially when over lubricated.

• Apply lubricant using a shaving brush, swabs, patches, or rag. A spray

bottle also works well using compressed air to circulate the lubricant

into all parts and to remove the excess.

Special use and maintenance of HK sound suppressed weapons

In addition to the basic maintenance instructions provided earlier, sound

suppressed weapons require additional special attention from the

operator. Consult the instructions received from the manufacturer with

the sound suppressor for additional guidance.

All weapons with sound suppressors require more cleaning than the

same type of weapon without a sound suppressor. This is because the

sound suppressor is designed to capture or “suppress” the expanding

propellant gases that exit the muzzle of the weapon behind the

projectile. These gases exit the weapon at a supersonic velocity causing

a “muzzle blast”. The sound suppressor captures these propellant

gases, contains them within a series of baffles or chambers and allows

them to escape at a slower velocity thus eliminating the muzzle blast.

At the same time that the gases are contained, so is the carbon fouling

and propellant debris that would normally be blown out of an

unsuppressed weapon with the propellant gases. More fouling and

debris stays behind in a sound suppressed weapon and thus there is

more for the operator to remove during his cleaning.

In order to be effective, a sound suppressed weapon must also provide

some means to reduce or eliminate the supersonic “crack“ of the

projectile as it leaves the muzzle at a supersonic velocity (above 1,088

feet/second at sea level).

This can be accomplished in two ways. One. By venting gases from

UMP SUBMACHINE GUN

behind the projectile as it passes through the bore and sound suppressor

thus lowering the exit velocity of the bullet below 1,088 feet/second.

Or two, by firing ammunition in the weapon that is down-loaded to a

velocity below the supersonic range. This is the method used in the HK

UMP submachine gun. For this reason this ammunition is termed

“subsonic” and usually falls into the range between 875 – 1,050

feet/second. Both methods are effective but each has it’s own

disadvantages and advantages.

There are two different styles of sound suppressors available for use on

the UMP submachine gun, a quick connect aluminum or stainless steel

sound suppressor.

Both versions are of the “wipeless” design, meaning they have no

rubber or synthetic membranes (wipes) that the bullet must penetrate.

The projectile does not touch any portion of the wipeless sound

suppressor. Wipeless designs are far more durable than other designs

and generally give the best accuracy results.

UMP with quick connect sound suppressor

• The HK UMP submachine guns are designed to be fired using

supersonic or subsonic ammunition with any weight projectile and with

or without the sound suppressor attached.

• The Aluminum Bruegger & Thomet Quick Connect UMP .45 caliber

sound suppressor is 6.70 inches long and weighs .99 pounds. It is

intended to be used with subsonic ammunition for maximum sound

suppression. The UMP does not have a vented barrel as is found

on the HK MP5SD and therefore does not lower the velocity of the

ammunition fired in it. These quick connect sound suppressors can be

used with supersonic ammunition but the supersonic “crack“ of the

projectile will still remain even though the sound suppressor does

eliminate the “muzzle blast” caused by the propellant gases. Other

sound suppressors are available for use on the UMP, contact HK for

additional guidance.

• Accuracy from the quick attach sound suppressor is excellent, often

better than the weapon without the sound suppressor attached,

though there is sometimes a slight change in zero when the sound

suppressor is attached. This is mostly due to the longer distance that

the projectile must pass through (similar to firing through a longer

barrel) on it’s way to the target.

• Effectiveness and service life of sound suppressors varies greatly due

to countless variables. Some of these variables include the type and

quantity of ammunition used, the predominant mode of fire used, the

operational environment in which the weapons are employed, etc.

SOUND SUPPRESSOR

Generally, the aluminum Bruegger & Thomet UMP sound

suppressors when used with the recommended ammunition provide

20–25 decibels (dBA) sound reduction when compared to an

unsuppressed weapon.

• An aluminum sound suppressor will generally maintain its

effectiveness to 20,000 rounds; stainless steel suppressors to 40,000

rounds or more.

• Older sound suppressors can be replaced by the operator for a

reasonable cost. Many teams will keep the older sound suppressor for

training and maintain the newer one for operational use where peak

performance is desired.

Observe the following recommendations

• DO NOT attempt to open the sealed sound suppressor body

• DO NOT allow the sound suppressor to loosen during use.

• DO NOT use any form of tool or wrench to install or remove the

sound suppressor.

• Always tug forward on the UMP sound suppressor after mounting to

ensure that it is properly attached.

• If the sound suppressor will not detach from the weapon, consult the

section entitled “Normal Cleaning” of the sound suppressor or call

Heckler & Koch for guidance.

• DO NOT fire the UMP with the aluminum sound suppressor full of

water. Allow the water to drain from the sound suppressor before

attempting to fire the weapon.

• DO NOT attempt to fire the weapon if the sound suppressor has been

dented or damaged or there is damage around the exit hole or if the

sound suppressor fits loosely on the weapon.

• DO NOT insert anything into the body of the sound suppressor such

as a cleaning rod or brush.

• DO NOT add to or fire the weapon with oil, grease or any foreign

matter inside unless directed to by the manufacturer of the specific

sound suppressor.

• Keep the muzzle and attachment interface for the sound suppressors

and muzzle mounted accessories as clean as possible at all times to

insure that the sound suppressor and accessories can be easily

attached and detached when required. Clean the muzzle with a nylon

toothbrush or patch soaked in oil or solvent during each cleaning.

Lightly lube the muzzle once it is clean. A dirty muzzle can make it

very difficult to attach and detach the sound suppressor.

UMP SUBMACHINE GUN

Ammunition

The UMP submachine gun was designed to use ammunition designed to

NATO or SAAMI specifications. Like an automobile engine, you cannot

expect top performance by using poor quality fuel. The same applies to

firearms. There are a number of general considerations that should be

made when choosing the type of ammunition you plan to use in the

UMP.

DO USE

• Ammunition of the appropriate caliber and of recent manufacture

• Clean burning ammunition

• Non-corrosive ammunition

• Jacketed Hollow Point (JHP), “Silver-Tip”, ball, truncated cone, “Hydra

Shok”, +P, etc.

• Limited quantities of .45 Super ammunition in the UMP45 model

DO NOT USE

• Reloads or remanufactured ammunition. Beware of military surplus,

foreign or outdated ammunition.

• Non-jacketed or exposed lead ammunition

• Corrosive ammunition (primer and/or propellant)

• Any ammunition that exceeds NATO or S.A.A.M.I. pressure limits

• Empty cases as “dummy“ (inert) rounds, as damage may result to the

weapon, especially the synthetic magazines employed in the UMP.

Use complete dummy rounds available for training purposes.

• Aluminum cased ammunition (i.e. CCI Blazer) in the UMP40.

Stoppages

In the event of stoppages on the UMP, the weapon is to be considered

loaded until the actual cause of the stoppage has been determined.

During the elimination of stoppages, safety precautions are to be taken

into account.

In the event of stoppages on the UMP, for example the cartridge fired

from the UMP is not ignited, the bolt assembly does not close

completely, or the spent cartridge case is not ejected, the following

immediate steps have to be taken:

1. Put the UMP on (Safe).

2. Remove the magazine.

3. Unload the UMP.

4. Ensure that barrel, cartridge chamber and receiver are free of

obstructions.

TROUBLESHOOTING

5. Next, determine and eliminate the cause of the stoppage. The

items indicated in the following tables do not cover all stoppages

theoretically possible. A given stoppage may also have been caused

by other reasons than the ones indicated.

Stoppage Cause Remedy

Cartridge not ignited Ammunition fault Recock UMP

(Dud round)

Firing pin damaged Take UMP to

or broken maintenance shop

Hammer spring damaged Take UMP to

damaged or broken maintenance shop

Bolt did not stay open on Cartridge case stuck in Unload. Retract bolt to

the last shot chamber because it is eject spent case. Clean

deformed or the chamber if fouled. If required take

is dirty UMP to maintenance shop

Cartridge case not Chamber is dirty. Clean cartridge chamber.

extracted or ejected Extractor broken. Take UMP to

maintenance shop

Ejector damaged Take UMP to

maintenance shop

Insufficient bolt recoil Unload. Retract load via

cocking lever to eject spent

case. Check for smooth

movement of bolt and

check chamber for fouling.

Clean if required.

UMP SUBMACHINE GUN

Stoppage Cause Remedy

No cartridge fed by bolt. Magazine not properly Insert magazine properly.

inserted.

Magazine loose Check magazine catch and

notch on magazine. If

required take UMP to

maintenance shop.

Follower spring lame Replace magazine or

follower spring and take to

maintenance shop.

Magazine lips damaged Replace magazine or

magazine housing and

take the damaged one to

maintenance shop

Bolt not fully closed. Cartridge chamber dirty Clean cartridge chamber.

Cartridge not fully fed. Cartridge damaged Recock

Recoil spring lame Take UMP to maintenance

shop

Improperly cocked Allow cocking lever to snap

forward. On releasing

cocking lever do not ride it

forward.

Bolt does not stay open Magazine spring lame. Replace magazine and

after last shot take damaged one to the

maintenance shop

Catch damaged Take UMP to maintenance

shop.

Magazine stuck in Magazine damaged Replace magazine spring

magazine well and take damaged one to

to the maintenance shop

Magazine catch defective Take UMP to maintenance

shop.

CARRYING SLING

Carrying sling

The carrying sling enables the UMP to be carried in several ways. In this

process, the buttstock may be folded up or unfolded.

The carrying sling is attached to the mounting points on the receiver,

handstop, or buttstock via the carbine hooks.

Length Adjustment

• Close coupler

• Rest the carrying sling between thumb and index finger and let the

UMP hang down in a horizontal position. Adjust the length in such a

way that there is a space of approximately 10 cm (4 inches) between

your forearm and the UMP (Fig. 34).

For adjustment

• Slide the forward buckle and coupler with the sewn-up end as far as

possible up to the front carbine.

• Somewhat loosen the belt loop in the rear buckle.

• To shorten the carrying sling, pull the upper loop forwards

• To lengthen the carrying sling, pull the upper loop to the rear.

• Tighten loop in the buckle

• Tighten carrying sling

Routing the Carrying sling

In order to carry the UMP laterally against the body or in front of the

body (ready position), or on the back, the carrying sling must be properly

routed. To do so:

• Pull the two halves of the carrying sling apart and upwards.

• Place the upper part of the carrying sling onto your shoulder over your

head.

UMP SUBMACHINE GUN

Fig. 34 Length adjustment

Fig. 35 Place upper half onto shoulder over the head

CARRYING SLING

Carrying modes

Fig. 36 UMP across the chest

Fig. 37 UMP on the back

UMP SUBMACHINE GUN

Firing positions

Fig. 38 UMP fired from the shoulder

Fig. 39 UMP fired from the hip

SIGHT ALIGNMENT FOR THE UMP

Sight Adjustment

If the point of impact has to be corrected, this will be done by adjustment

of the rear sight using the Allen wrench provided with the weapon.

The UMP is zeroed at the factory to hit the point of aim at 25 meters

(27.3 yards).

Elevation adjustment

• To lower the weapon’s point of impact, turn the elevation adjustment

screw clockwise.

• To raise the weapon’s point of impact, turn the elevation adjustment

screw counterclockwise.

NOTE: 1 revolution of the elevation adjustment screw changes the

point of impact by 4.5 centimeters (1.77 inches) at a range of 25

meters (27.3 yards).

Windage adjustment

• To move the weapon’s point of impact to the left, turn the windage

adjustment screw counterclockwise.

• To move the weapon’s point of impact to the right, turn the windage

adjustment screw clockwise.

NOTE: 1 click of the windage adjustment screw changes the point of

impact by 1.15 centimeters (.45 inches) at a range of 25 meters (27.3

yards).

Fig. 40 Elevation adjustment Fig. 41 Windage adjustment

UMP SUBMACHINE GUN

Correct point of aim

Even circle of light

Sight alignment for UMP

Fig. 42 Sight pictures

Point of aim

Rear sight

Aperture

Circle of light

Front sight holder

Front sight post

Impact as with incorrectly

centered front sight = right

Impact as with full sight

= high Impact as with fine sight

= low

Impact as with incorrectly

centered front sight = left

SPECIFICATIONS

Specifications UMP45

Caliber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45 ACP

Operating principle . . . . . . . . . . . . . . . . . . . . . . . . . .Simple blow back, firing from a closed bolt position

Dimensions

Overall length, buttstock extended . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 690 mm (27.17 in)

Overall length, with sound suppressor, buttstock extended . . . . . . . . . . . . . . . . . . . . 860 mm (33.86 in)

Overall length, buttstock folded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450 mm (17.72 in)

Overall length, with sound suppressor, buttstock folded . . . . . . . . . . . . . . . . . . . . . . 620 mm (24.41 in)

Overall width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63.5 mm (2.50 in)

Overall height with magazine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326 mm (12.83 in)

Barrel length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 mm (7.87 in)

Twist length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 406 mm (15.98 in)

Sight radius . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325 mm (12.80 in)

Weights

UMP without magazine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . approximately. 2.26 kg (4.93 lb.)

Magazine, empty (25 rounds) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.17 kg (.38 lb.)

Carrying sling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.10 kg (.22 lb.)

Sound suppressor (B&T) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.38 kg (.84 lb.)

Other Data

Muzzle velocity (M1911) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . approximately. 260 m/s (853 fps)

Muzzle velocity (+P) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . approximately. 380 m/s (1,247 fps)

Cyclic rate of fire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . approximately. 600 rpm (M1911)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . approximately. 700 rpm (+ P)

Firing modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Semi -automatic, 2-round burst, fully automatic

Sights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Modular approach,

Standard adjustable mechanical sight,

Accessory mounting rails for optional aiming devices

Bore profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6x polygonal, right-hand twist

Specifications UMP40

Caliber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40 S&W

Operating principle . . . . . . . . . . . . . . . . . . . . . . . . . .Simple blow back, firing from a closed bolt position

Dimensions

Overall length, buttstock extended . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .690 mm (27.17 in)

Overall length, with sound suppressor, buttstock extended . . . . . . . . . . . . . . . . . . . . 860 mm (33.86 in)

Overall length, buttstock folded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450 mm (17.72 in)

Overall length, with sound suppressor, buttstock folded . . . . . . . . . . . . . . . . . . . . . . 620 mm (24.41 in)

Overall width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63.5 mm (2.50 in)

Overall height with magazine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303 mm (11.93 in)

Barrel length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 mm (7.87 in)

Twist length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 377 mm (14.84 in)

Sight radius . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325 mm (12.80 in)

Weights

UMP without magazine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .approximately. 2.1 kg (4.63 lb.)

Magazine, empty (30 rounds) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.17 kg (.38 lb.)

Carrying sling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.10 kg (.22 lb.)

Sound suppressor (B&T) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.38 kg (.84 lb.)

Other Data

Muzzle velocity (Winchester 180 grain JHP) . . . . . . . . . . . . . . . . . . . .approximately 358 m/s (1174 fps)

Muzzle velocity (Corbon 150 grain JHP +P) . . . . . . . . . . . . . . . . . . . . approximately 384 m/s (1260 fps)

Cyclic rate of fire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . approximately 745 rpm

Firing modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Semi -automatic, 2-round burst, fully automatic

Sights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Modular approach,

Standard adjustable mechanical sight,

Accessory mounting rails for optional aiming devices

Bore profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6x polygonal, right-hand twist

UMP SUBMACHINE GUN

Upper receiver with barrel,complete (I - 21) 217503

1 Upper receiver, incomplete 217509

2 Front sight 217506

3 Roll pin, front sight, 4x 144 mm 928747

Rear sight, complete. (4 - 10) 217513

4 Sight support 217992

5 Flat spring 217515

6 Rear sight 217516

7 Windage adjustment screw 217517

8 Rear sight spring 217518

9 Sight support spring 217504

10 Elevation adjustment screw 217505

11 Roll pin, sight support 987695

12 Cocking lever 217519

13 Cocking lever spring 217508

14 Cocking lever support 217507

15 Roll pin, cocking lever support 986546

16 Barrel .45 ACP 219403

Barrel .40 S&W 219402

17 Roll pin, barrel, 6 x 32mm 988425

18 Ejector 219399

Hand stop, complete. (19-21) 219364

19 Hand stop, incomplete 219342

20 Insert plate, handstop 219343

21 Cylindrical screw, handstop 5 x16 mm 219414

22 Axle, buttstock 219401

Butt stock, complete (24- 25) 217558

23 Locking pin, complete. 217197

24 Buttstock, incomplete 217559

25 Buttstock lock 205454

26 Spring for buttstock lock 205455

Bolt, complete .45 ACP (27 - 31) 217572

Bolt, complete .40 S&W (27 - 31) 217562

27 Bolt , incomplete, .45 ACP 217574

27 Bolt , complete., .40 S&W 217564

28 Extractor .45 ACP 217573

Extractor .40 S&W 217231

29 Firing pin assembly, complete 217555

30 Firing pin spring 217523

31 Firing pin retaining pin 217587

32 Recoil spring assembly, complete 217548

Pistol grip, complete. (33 - 58) 217531

33 Pistol grip, incomplete 217546

34 Trigger 205420

35 Trigger spring 205422

36 Axle (3x) 217532

Fig. 43 UMP

.45 ACP & .40 S&W

Item Description Part No. Item Description Part No.

EXPLODED DIAGRAM & PARTS LIST

Item Description Part No. Item Description Part No.

NOTE: UMP .40 S&W parts are

shown in italics in parts lists

37 Sear 205439

38 Sear spring 205421

39 Release lever 217535

40 Release lever spring 217534

41 Hammer 217545

42 Hammer spring, left 217533

43 Hammer spring, right 217585

44 Notched disk 205417

45 Compression spring 205418

46 Index plate 205419

47 Slide 214608

48 Safety lever, left 217753

49 Safety lever, right 214607

50 Magazine release 217537

51 Magazine release spring 217536

52 Magazine release axle 217538

53 Bolt catch 217540

54 Bolt catch spring 217539

55 Roll pin,bolt catch 928080

56 Backplate 217541

57 Buffer 217544

58 Pistol grip cover 205438

Magazine complete .45 (59 - 63) 217576

Magazine complete .40 (59 - 63) 217766

59 Magazine housing, .45 ACP 217581

Magazine housing, .40 S&W 217767

60 Follower .45 ACP 217577

Follower .40 S&W 217769

61 Magazine spring .45 ACP 217578

Magazine spring .40 S&W 217799

62 Locking plate .45 ACP 217579

Locking plate .40 S&W 217770

63 Floor plate 217580

Picatinny rail, short, complete with screws 219362

64 Picatinny rail, short 219660

65 Cylindrical screw (2x) 219413

Picatinny rail, long, complete. (66 - 67) 219363

66 Picatinny rail, long 219661

67 Cylindrical screw (2x) 219413

68 Sound suppressor, complete .45 ACP * 217831

Sound suppressor, complete .40 S&W *217831

69 Carrying sling, UMP complete. 219085

70 Magazine loader * 219404

* not pictured

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