UMP / USC Barrels

Barrel - HK USC 45 in Exc + shape HK German factory USC 45 barrel in excellent + condition. Rare and hard to find. 

HK Parts and Heckler and Koch HK UMP and HK USC 9mm Conversion Kit - Threaded Barrel 1/2x28 - 3-Lug This UMP, USC conversion kit will convert existing conversions to 9mm. This is a simple drop-in conversion for those who have already done the USC-UMP...

HK UMP 9mm Barrel US made replica of the HK UMP 9mm barrel. Counts as one US made compliant part as an added bonus.

HKP HK UMP 9mm Conversion Kit -Threaded 1/2x28 9mm UMP/USC conversion kit will convert existing USC-UMP conversions to 9mm. This is a simple drop-in conversion for those that have already done the USC-UMP conversion. The conversion parts are drop in with...