UMP / USC Magazines / Brass Catchers

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

HKP HK Parts HK UMP (.40 S&W) 30 Round Magazine Housing ONLY - BLEMISHED Priced for ONE Magazine Housing ONLY - Condition Varies by Unit - Each unit Sold INDIVIDUALLY ONLY 2 UNITS AVAILABLE - AS PICTURED MAGAZINE BODY ONLY COSMETICALLY BLEMISHED...

Raddlock Key - HK Series - BLEMISHED ONLY 1 UNIT AVAILABLE - AS PICTURED MISSING ALLEN KEY COSMETICALLY BLEMISHED PARTS ARE FULLY FUNCTIONAL AND SOLD AS IS. THIS PART IS NOT ELIGIBLE FOR RETURN. ALL BLEMISHED PART SALES ARE FINAL. Raddlock kits convert...

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...

H&K USC (.45 ACP) Magazine Floor Plate

HK USC .45 10 Round Magazine Body. This is the only magazine body that HK offers for the HK USC. Compatible With: HK USC Carbines