H&K Heckler & Koch

H&K UMP/USC/G36/SL8 (.40 S&W/.45 ACP/9mm/5.56/.223) Index Plate Compression Spring

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

HK Factory German USC/UMP Side Or Bottom Rail W/ Screws Up to three sides can be used - two for the sides and one for the bottom. Best quality and price available anywhere. Made from hard coat...

H&K UMP/USC (.40 S&W/.45 ACP/9mm) Rear Sight - Incomplete

New HK German Factory USC/UMP Front Sight This is a common wear or breakage part. This part is easy to swap out by just knocking out the roll pin, replacing it, and then re-inserting the roll pin...

New HK German USC & UMP 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...

HK German USC & UMP Firing Pin Assembly Complete A great spare to have on hand as this item is a hard-to-find replacement part. Compatible With: USC 45 UMP 45 UMP 40 UMP 9mm ALL USC...

HK USC & UMP Factory German Tactical Sling -Black 

HK German USC, UMP Barrel Pin - German HK recommends replacing the barrel pin when the barrel is removed with a new barrel pin. This is a great spare part to have on hand. The factory-correct barrel...

HK German UMP Or USC .40 Extractor New HK German factory OEM part. This is a high wear and replacement item as the .40 cal cartridge has a high impulse that results in an increased occurrence of this...

H&K USC .45 ACP 2 Position (0,1 Pictogram) Incomplete Trigger Housing - Grey Enhance your H&K USC .45 ACP with this high-quality incomplete trigger housing in grey. This housing is designed...

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