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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. 
    						
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