UMP / USC Small Parts

HK UMP, USC, G36, & SL8 Sear Spring This part is used in conjunction with the sear in the trigger body of the lower.  

H&K UMP/USC (.40 S&W/.45 ACP/9mm) Firing Pin Spring This is a common wear and breakage item. This item also frequently becomes lost by end users when field stripping the UMP and USC Bolts.  Compatible with: All HK UMP & USC Firearms

HK UMP & USC Magazine Release Spring HK German factory mag release spring for all USC and UMP mag releases.  Compatible With:  USC lowers UMP lowers

HK UMP, G36 Pistol Grip Storage Insert G36 & UMP pistol grip insert for all G36 & UMP lower housings. This is the piece that locks into place and fits in the bottom of the handle itself. This is a perfect storage location for paperwork, spare...

H&K UMP (.45 ACP) Magazine Locking Plate

HK G36 Folding Stock Release Spring This is the spring that fits under the stock release button to activate the folding and retention of the G36 or UMP stock. Compatible With: HK G36 HK G36K HK G36C UMP

Heckler and Koch .45 ACP Carbine Magazine Release for HK USC This is a great replacement as they are prone to breakage and wear. Please Note: For those that have a HK USC with a bullet button and are moving to a free state and want to revert back to the...

Heckler and Koch HK UMP and HK USC Lower Axle Pin - US 3 lower axle pins are used for each trigger group or lower all the same size with the exception of the mag release axle on the USC.

Heckler and Koch Magazine Release Axle for HK UMP Replacement magazine release axle for HK UMP platforms. This component is commonly replaced due to wear or breakage and may also be required when configuring compliant magazine release systems where...

HK UMP & USC Cocking Lever Support Tube  

H&K UMP/USC (.40 S&W/.45 ACP/9mm) Bolt Catch Pin

HK UMP Catch Release Lever Or Trip Lever For All UMP Lowers