UMP / USC Small Parts

HK USC & UMP Slide For Lower - German New HK German USC slide for conversion of UMP lower. 

HK German USC Magazine Release Axle This is a great replacement as they are prone to breakage and wear. These are also a missing part in some states where bullet buttons are required. This part is compatible with all HK USC...

HK USC Lower Locking Lever Axle A great item to have on hand as spares. New German HK. Compatible With: All USC lowers

HDPS HK UMP/USC (.40 S&W/.45 ACP/9mm) Stock Block B - Push Pin This sling pin will replace the current production stock Block B hardware and upgrade to the Sling Pin Pull Style version.

UMP Paddle Magazine Release - Extended Billeted alloy UMP magazine release. This is a very common repair & replacement part as they are fairly easy to break on the UMP lower. With this new metal mag release you get more surface area as well as a much...

HKP HK UMP/USC (.40 S&W/.45 ACP/9mm) Stock Block B Sling Pin The original thumb screw version for all stock block B's.

HK UMP & USC Bolt Catch  New HK German lower. Compatible With: HK UMP HK USC

HK German Hand Stop Screw     #21 Cylindrical screw, handstop 5 x 16 mm 219414

H&K UMP (.40 S&W) Magazine Locking Plate German HK.

HK UMP & USC Right Side Hammer Spring For Lowers

H&K USC (.45 ACP) Magazine Locking Plate Insert

HKP HK UMP/USC 4 Piece M-LOK Set - Cerakote Upgrade your UMP/USC with the HK Parts 4-piece M-LOK set. This kit significantly expands the range of attachments you can add to your UMP/USC receiver, making it the ultimate choice for customization. Crafted...