H&K Heckler & Koch

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

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

HK UMP & USC Bolt Catch Spring Compatible With: HK UMP HK USC

HK German UMP Rear Stock Axle Pin This is the HK factory German stock pin that allows you to attach the stock to either the factory receiver of a UMP or for those that are doing the USC to UMP...

HK UMP & USC Cocking Handle Pin Compatible With: HK UMP HK USC

HK UMP & USC Cocking Lever New HK German part. Compatible With: HK UMP HK USC

Heckler and Koch Cocking Lever Spring for HK UMP and HK USC A great spare part to have on hand. Compatible With: UMP9 UMP40 UMP45 USC

HK UMP & USC Cocking Lever Support Tube  

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

HK German UMP & USC Ejector Lever - German New HK German OEM part. Each unit fits all calibers of UMP & USC firearms. A great spare to have on hand as they are prone to shearing off with use...

New USC & UMP .45 Extractor - German Compatible with both the USC & UMP. Perfect for spares as they are prone to breakage and are a common wear item. Please Note: HK considers this a high...

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...