UMP / USC Series
Choose from an expansive selection of HK UMP and USC parts, such as HK UMP Barrels and HK USC Stocks, crafted for those who value reliability and performance. Upgrade with HK USC Handguards and HK UMP Triggers, and experience the difference in quality and craftsmanship.
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Out Of Stock
HK UMP Paddle Mag Release Complete Assembly
$19.95UMP Paddle Magazine Release - US Made - Assembly Complete New UMP Mag release. This is a very common repair & replacement part as they are fairly easy to break on the UMP lower. Simple & easy to install no gunsmith needed or required. Compatible...$19.95 -
Out Of Stock
HK USC Carbine Mag Release - Extended - .45 ACP
HKP HK Parts
$24.95HK USC Alloy Mag Release - Extended Billeted alloy USC magazine release. This is a very common repair & replacement part as they are fairly easy to break on the USC lower. With this new metal mag release you get more surface area as well as a much...$24.95 -
Out Of Stock
HK UMP/USC (.40 S&W) Extractor
$39.95New US-Made USC Or UMP .40 Extractor This part is a repair and replacement item, as these are prone to breakage, and it's a part that's hard to find and a great item to have on hand. Please Note: HK considers this a high wear and replacement...$39.95 -
Out Of Stock
HK UMP (.40 S&W/.45 ACP/9mm) Incomplete Pistol Grip (0,1,2,F)
H&K Heckler & Koch
$0.00Stripped UMP Pistol Grip - 4 Position (0,1,2,D) Pictogram$0.00 -
Out Of Stock
HK UMP (.40 S&W/.45 ACP/9mm) Incomplete Pistol Grip (0,1,F)
H&K Heckler & Koch
$0.00UMP Pistol Grip Stripped & Incomplete - 3 Position (0,1,F) Pictogram New German HK UMP 3 position lower.$0.00 -
Out Of Stock
HK UMP (.40 S&W/.45 ACP/9mm) Incomplete Pistol Grip (0,1)
H&K Heckler & Koch
$0.00UMP Pistol Grip Stripped & Incomplete - 2 Position (0,1) Pictogram New HK German manufacture, rare and hard to find. If you have an HK USC you can use this housing with the USC lower internals for a complete USC to UMP lower assembly that you can use...$0.00 -
Out Of Stock
HK UMP (.40 S&W/.45 ACP/9mm) Demilled Rear Receiver Section
H&K Heckler & Koch
$0.00HK UMP Demilled Receiver Section This is a demilled factory HK UMP rear receiver section that is perfect for the new Tom Bostic USC-UMP conversions. This section is the perfect length in order to do the USC/UMP conversion. Last one available.$0.00 -
Out Of Stock
HK UMP (9mm) Parts Kit
H&K Heckler & Koch
$0.00HK UMP 9mm Parts Kit - Like New Condition Click this link to complete your build with an S5 Tactical receiver.. Includes: Front Sight 9mm Bolt Group Complete 9mm Ejector Lever Folding Stock 0,1,F Lower Trigger Group 1 x 30 round 9mm Factory...$0.00 -
Out Of Stock
HK UMP, USC Kit - Caliber Conversion - 9mm - 30 Round
HKP HK Parts
$999.95HK Parts and Heckler and Koch HK UMP and HK USC 9mm Conversion Kit - Threaded Barrel 1/2x28 - 3-Lug This UMP, USC conversion kit will convert existing conversions to 9mm. This is a simple drop-in conversion for those who have already done the USC-UMP...$999.95 -
Out Of Stock
HK UMP Barrel - 9mm - Standard
HKP HK Parts
$299.95HK UMP 9mm Barrel US made replica of the HK UMP 9mm barrel. Counts as one US made compliant part as an added bonus.$299.95 -
Out Of Stock
HK UMP Bolt Group - Semi Auto - 9mm
HKP HK Parts
$369.95HK UMP 9mm -Semi-Auto Bolt Group The semi-auto bolt group is required for HK USC to HK UMP caliber conversions. The full-auto bolt carrier will not work in HK USC rifles. Includes: Extractor Firing pin Retaining Pin Firing pin &...$369.95 -
HK USC Magazine Floorplate - .45 ACP
H&K Heckler & Koch
$8.95H&K USC (.45 ACP) Magazine Floor Plate$8.95