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Heckler And Koch HK USC Carbine 45 ACP Operators Manual

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    							21
    DISASSEMBLY
    20USC STORAGE
    NOTE: The USC is easily disassembled and reassembled with the HK
    Tool. Do not use force in any of the disassembly procedures.
    Disassembly beyond the procedures outlined in this manual is not
    recommended and may void the HK Warranty. Disassembly beyond
    the operators level described here may be carried out by qualifiedmaintenance personnel only. Contact HK for more information.
    Clear the carbine! Before handling the firearm, “clear it!” Do so by:
    1 • Make sure fingers are outside of the trigger guard and the
    weapon is pointed in a safe direction at all times!
    2 • 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.)
    3 • REMOVE MAGAZINE – Depress the magazine release lever and
    remove the magazine from the magazine well.
    4 • 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.
    5 • 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 firearm or magazine before handling the USC
    further.
    The HK USC is now considered “Clear.”Once clear, let the bolt move
    forwards. 1. Store the carbine clean and lubricated.
    2. Store the carbine without a round in the chamber.
    3. Store the carbine 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 carbine and magazines every twelve (12)
    months while in storage.
    6. Store the carbine is a clean, dry environment with regulated
    temperature controls. 
    						
    							23
    DISASSEMBLY INTO ASSEMBLY GROUPS
    22USC CARBINE
    Disassembly of the Bolt 
    1 •Push and hold firing pin forward.
    2 •Pull out firing pin assembly retaining pin to the left (Fig. 28).
    3 •  Remove firing pin assembly and firing pin spring to the rear. To
    do this, push the locking catch to the right (Fig. 29). With your
    thumb prevent the firing pin assembly with firing pin spring from
    springing out.
    Fig. 28                                       Fig. 29
    Pull out firing pin retaining pin    Push locking catch to the rightWARNING: Never disassemble the firing pin. It is possible to
    assemble the firing pin assembly incorrectly and in doing so,disabling the USC firing pin safety. Contact HK for more information.
    Assembly of the Bolt 
    1 •Place firing pin spring onto firing pin.
    2 •Insert firing pin spring and firing pin assembly into the bolt from
    the rear and push them forwards (Fig. 30).
    3 •Using any pointed object push the rear end of the firing pin
    forwards (Fig. 31).
    4 •Insert firing pin retaining pin from the left to retain firing pin
    assembly in the bolt.
    Fig. 30                                       Fig. 31
    Insert firing pin spring            Push firing pin forwards  
    and firing pin assembly
    locking
    catch
    Stripping into assembly groups
    1 •  Detach carrying sling
    2 •  Use the 5 mm Allen wrench of the HK tool and remove the hex
    headed Allen screws located on the left and right sides of at the
    rear end of the receiver
    3 •  Pull the buttstock straight backwards out of the guiding rails of
    the lower the receiver.
    4 •  Swivel the lower receiver downwards at an angle of
    approximately 45°and detach it from the support bolts of the
    upper receiver (figures 23 & 24).
    Fig. 23  Detaching lower receiver           Fig. 24  (Detail) lower receiver
    5 •  Pull back the cocking lever and remove the recoil spring
    assembly and the bolt to the rear (figure 25).
    Fig. 25  Removing recoil spring        
    						
    							25
    ASSEMBLY
    24USC CARBINE
    Reassembly of the USC 
    1 •With the cocking lever forward, insert the bolt and recoil spring
    assembly to the receiver from the rear.
    2 •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).
    Fig. 32
    3 •Hold the upper and lower receiver firmly together. Slide buttstock
    guiding rails horizontally into the appropriate slots of the lower
    receiver (Fig. 33).
    Fig. 33
    Pushing buttstock into upper and lower receiver
    4 •Fasten the buttstock to the upper receiver by means of the two
    Allen screws with the HK tool (do not use excessive force to
    tighten the screws down).
    5 •Put the USC safety/selector on   (Safe).
    6 •Insert empty magazine.
    7 •Carry out a function check as described on page 26.
    8 •Attach carrying sling (Fig. 34)
    Disassembly of the Magazine 
    1 •Depress locking plate through magazine floor plate and slide
    magazine floor plate to the rear (fig. 30).
    2 •Detach magazine floor plate to the rear.
    3 •Remove follower spring with locking plate and follower.
    Fig. 30CAUTION: Magazine floor plate is under spring tension. With your
    thumb secure locking plate with follower spring to prevent it fromspringing out.
    Assembly of Magazine 
    1 •Insert follower and follower spring with locking plate into the
    magazine housing from below.
    2 •Fully depress follower spring and locking plate (Fig. 31) and
    slide magazine floor plate onto magazine housing from the rear.
    3 •Push magazine floor plate forwards as far as it will go.
    4 •Check that the floorplate is fully seated and secured in place by
    the tab of the locking plate.
    Fig. 31      
    						
    							27
    CLEANING & MAINTENANCE
    26USC CARBINE
    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 USC 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 USC, especially with its polymer construction, need not
    take hours and a great deal of effort. With the right equipment a very
    fouled USC 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 cleaning machines, do not immense the
    painted portion of the USC, specifically the color pictogram firing
    mode markings on the lower receiver. Ultra sonic cleaning or strongsolvents will remove the markings! 
    •If such a set up is not available to you, a complete weapons cleaning
    kit specially designed for the HK USC will reduce your cleaning time
    and make the job easier.
    •Any quality weapons solvent or oil can be used to clean the USC.
    Basically, if it’s safe to put your bare hands into it won’t hurt the
    surfaces of the weapon.Break-Free (CLP), Ballistol, Militecor any
    of the other brand-name cleaners or lubricants specifically designed
    for use with weapons will work well on the USC.
    •At HK we recommend two types of operator cleaning. Normal cleaning
    and Major cleaning. Fig. 34                                            
    Attaching carrying sling
    NOTE: A Function Check should be performed anytime the carbine
    is reassembled. This quick check indicates whether or not the
    carbine 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 carbine. ALWAYS clear the
    carbine before performing the Function Check! ENSURE thecarbine is clear!
    1 •Clear the carbine!
    2 •Place the cocking lever and bolt group in the forward position.
    3 •With the carbine 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 carbine. Release the
    trigger. Listen for the “click”of the trigger and sear resetting. Pull
    the trigger. Hammer should fall.
    6 •The Function Check is now complete.  
    						
    							29
    CLEANING
    28USC CARBINE
    •  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 Cleaning Kit for the USC carbine.
    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. 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.
    •Muzzle – Use a nylon bristle toothbrush and a small amount of solvent
    to remove any fouling from the muzzle.
    Bolt groupScrub 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. Normal cleaning
    Performed after each firing or every twelve (12) months.
    Major cleaning
    Often referred to as “detailed cleaning”. Performed on a USC after 1,000
    rounds 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  CARBINE!
    2. Disassemble the weapon into the major assembly groups.
    Multi-purpose carrying slingThe nylon webbing and plastic components
    of the multi-purpose carrying sling can be cleaned using warm water and
    a soft bristled brush. Allow the sling material to dry completely before
    storage or use. Avoid getting the metal sling components wet.
    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 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 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 use stainless steel
    brushes as they will damage the USC’s rifling. 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. 
    						
    							31
    LUBRICATION
    30USC CARBINE
    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 USC carbine.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)
    • Sling material
    • 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
    • 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 USC!
    •  Reapply lubrication to the bolt of the USC periodically during firing as
    it burns off from the heat.
    •  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. Major Cleaning 
    As mentioned earlier, Major cleaning should be performed after 1,000
    rounds are fired through a USC. 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 firearm components except the painted
    surfaces (firing modes symbols) 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.
    Operator inspection
    During or after cleaning the operator should inspect the firearm 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 USC. 
    						
    							33
    TROUBLESHOOTING GUIDE
    32USC CARBINE
    1. Put the USC safety/selector on   (Safe).
    2. Remove the magazine.
    3. Pull rearward on the cocking lever and lock the bolt open.
    4. Ensure that barrel, cartridge chamber and receiver are free of 
    obstructions.
    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 Replace round
    (Dud round)
    Firing pin damaged Take USC to 
    or broken maintenance shop
    Hammer spring  Take USC 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 USC to maintenance shop
    Cartridge case not  Chamber is dirty Clean cartridge chamber 
    extracted or ejected
    Extractor broken Take USC to 
    maintenance shop
    Ejector damaged Take USC to
    maintenance shop
    Insufficient bolt recoil Unload. Retract cocking
    lever to eject spent 
    case. Check for smooth
    movement of bolt and 
    check chamber for fouling.
    Clean if required.
    Ammunition
    The USC carbine was designed to use ammunition made 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 USC.
    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.
    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)
    •Empty cases as “dummy“ (inert) rounds, as damage may result to the
    weapon, especially the synthetic magazines employed in the USC.
    Use complete dummy rounds available for training purposes.
    •Any ammunition that exceeds NATO or S.A.A.M.I. pressure limitsWARNING: Only use ammunition designed to SAAMI specifications
    that is factory-loaded, undamaged, and of the correct caliber. The
    use of low powered cartridges (including wadcutter and semi-
    wadcutters bullets) could lead to functional stoppages (includingbullets stuck in the barrel) and is not recommended.
    Stoppages 
    In the event of stoppages on the USC, the carbine 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 USC, for example the cartridge fired
    from the USC 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:  
    						
    							35
    CARRYING SLING
    34USC CARBINE
    Carrying sling 
    The carrying sling enables the USC to be carried in several ways. The
    carrying sling is attached to the mounting points on the receiver,
    handstop, or buttstock via the carbine hooks.
    Length Adjustment 
    1 •  Close coupler 
    2 •  Rest the carrying sling between thumb and index finger and let
    the USC 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 USC.
    For adjustment 
    1 •  Slide the forward buckle and coupler with the sewn-up end as
    far as possible up to the front carbine.
    2 •  Somewhat loosen the belt loop in the rear buckle.
    3 •  To shorten the carrying sling, pull the upper loop forwards 
    4 •  To lengthen the carrying sling, pull the upper loop to the rear.
    5 •  Tighten loop in the buckle 
    6 •  Tighten carrying sling 
    Routing the Carrying sling 
    In order to carry the USC 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:
    1 •  Pull the two halves of the carrying sling apart and upwards.
    2 •  Place the upper part of the carrying sling onto your shoulder
    over your head.
    Stoppage Cause Remedy
    No cartridge fed by bolt. Magazine not properly Insert magazine properly
    inserted
    Magazine loose Check magazine catch and 
    tab on magazine. If 
    required  take USC 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 Replace cartridge
    Recoil spring lame Take USC 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
    Bolt catch damaged Take USC to maintenance 
    shop
    Magazine stuck in Magazine damaged Replace magazine housing
    magazine well and take damaged one to 
    to the maintenance shop
    Magazine catch defective Take USC to maintenance
    shop 
    						
    							37
    SIGHT ALIGNMENT
    36USC CARBINE
    Correct point of aim
    Even circle of light
    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
    = highImpact as with fine sight
    = low
    Impact as with incorrectly
    centered front sight = left
    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 USC 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 25meters (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 (27.3yards).
    Fig. 40 Elevation adjustment                 Fig. 41 Windage adjustment        
    						
    							39
    EXPLODED DIAGRAM & PARTS LIST
    38USC CARBINE
    Item Description Part No. Item Description Part No.36 Locking lever spring 214616
    37 Locking lever 219095
    38 Bolt 214615
    39 Locking lever housing 214613
    40 Elbow spring right 217946
    41 Elbow spring left 205201
    42 Hammer 217936
    43 Hammer spring, left 217533
    44 Hammer spring, right 217585
    45 Notched disk 217614
    46 Compression spring 205418
    47 Index plate 205419
    48 Axle, locking lever 219521
    49 Safety lever, left 217945
    50 Safety lever, right 205437
    51 Magazine release 219530
    52 Magazine release spring 217536
    53 Magazine release axle 219549
    54 Bolt catch 217540
    55 Bolt catch spring 217539
    56 Roll pin,bolt catch, 2 x 12 mm 92808057 Allen screw, buttstock (2) 217903
    * Magazine complete .45 (58 - 62) 219486
    58 Magazine housing, .45 ACP 219522
    59 Follower .45 ACP 219523
    60 Magazine spring .45 ACP 219524
    61 Locking plate .45 ACP 219525
    62 Floor plate 219526
    * Picatinny rail, short, complete with screws 219662
    63 Picatinny rail, short 219660
    64 Cylindrical screw (2x) 219413
    * Picatinny rail, long, complete (66 - 67) 219663
    65 Picatinny rail, long 219661
    66 Cylindrical screw (2x) 219413
    * HK tool 988496
    67 Carrying sling, USC complete 214085
    * Adaptor for UTL* 219693
    * not pictured * Upper receiver with barrel, complete (I - 21)
    1 Upper receiver, incomplete 219492
    2 Front sight 217506
    3 Roll pin, front sight, 4 x 144 mm 928747
    * Rear sight, complete (4 - 10) 217513
    4 Sight support 217504
    5 Flat spring 217515
    6 Rear sight 217516
    7 Windage adjustment screw 217517
    8 Rear sight spring 217518
    9 Sight support spring 217503
    10 Elevation adjustment screw 217505
    11 Roll pin, sight support, 4 x 30 mm 987695
    12 Cocking lever 217519
    13 Cocking lever spring 217508
    14 Cocking lever support 217507
    15 Roll pin, cocking lever support, 4 x 16 mm 986546
    16 Barrel .45  ACP 219497
    17 Roll pin, barrel, 6 x 32 mm 988425
    18 Ejector 219399
    * Hand stop, complete. (19-21) 21936419 Hand stop, incomplete 219342
    20 Insert plate, handstop 219343
    21 Cylindrical screw, handstop 5 x 16 mm 219414
    * Buttstock, complete (24- 25) 219496
    22 Buttstock 217528
    23 Buffer 217544
    * Bolt, complete .45 ACP (24 - 29) 219495
    24 Bolt, incomplete, .45 ACP 219499
    25 Extractor .45 ACP 217573
    26  Firing pin assembly, complete 217555
    27 Firing pin spring 217523
    28 Firing pin retaining pin 217587
    29 Recoil spring assembly, complete 217548
    * Lower receiver, complete (30-56) 219487
    30 Lower receiver, incomplete 219491
    31 Trigger 205420
    32 Trigger spring 217918
    33 Axle (3x) 217532
    34 Sear, complete 205439
    35 Sear spring 217917
    * Locking lever complete  219094
    Fig. 43  USC 
    .45 ACP 
    Item Description Part No. Item Description Part No.  
    						
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