Heckler And Koch HK UMP45, UMP40 Operators Manual
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31 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 SuppressorUse 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 slingThe 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 receiverRemove 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
32 UMP SUBMACHINE GUN compressed air. Forearm / foregripRemove 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 NOTpush 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.
33 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. MagazineDon’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 mustbe performed by, or at a minimum supervised by, an HK factory-trained armorer.
34 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 NOTuse 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
35 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
36 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 MP5SDand 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.
37 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.
38 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.
39 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.
40 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.