H&K Heckler & Koch

HK German UMP Lower Locking Pin For use with all HK UMP lowers and USC to UMP conversions. New HK German manufacture.  

New HK German USC/UMP 9mm Extractor This is the perfect spare part to have for your UMP or USC 9mm conversion. Hard to find and only available here at HKPARTS.

HK UMP 3 Position Navy Lower New German Heckler & Koch UMP Navy Lower. 3 position settings (0, 1, Full) each lower comes complete with all the factory internals. This item is ideal for the USC to...

HK German Hand Stop Screw

HK German Factory USC & UMP .45 Magazine Loader Fits all HK German UMP .45 25-round magazines as well as the USC 10-round factory magazines. A great addition for your range time and to avoid...

HK G36, SL8 & USC, UMP Fixed Rear Sight Flat Spring Compatible With: G36 SL8 USC. 45 UMP 9mm UMP .40 UMP .45

G36 & HK UMP Hammer For Lower Or Trigger Group 

HK UMP & USC Right Side Hammer Spring For Lowers

HK UMP & USC - Left Side Hammer Spring For All Lowers A high-wear item that needs to be changed when light firing pin strikes develop on your USC or UMP firearm. Compatible With:  HK UMP...

HK German USC .45 Factory Semi Bolt - Incomplete HK German USC, Omega GS 45 caliber bolt carrier that is stripped. Just add the firing pin, firing pin spring, extractor and firing pin retaining pin...

German HK UMP .45 Factory Full Auto Bolt Group Complete Used.Used German bolt carrier complete that is tungsten filled and the factory correct HK UMP .45 cal bolt group. Comes less the recoil...

German UMP .40 factory F/A Bolt Group - Complete This item is used in very good shape or better.