UMP / USC Triggers / Housings / Selectors

H&K USC/SL8 (.45 ACP/5.56/.223) Left Selector Lever HK German USC, SL8 left side selector lever 2 position 0,1 Safe, Semi only. Compatible With: HK SL8 HK USC

UMP - 2 Position Lower Grip Frame New UMP Lower. 2 position settings (S,F). Perfect for all your own internals. This item is ideal for the USC to UMP conversion or to keep as a spare. Each lower fits & works with the 45, 40 & 9mm calibers using...

HK Ratched Wheel, Notched Disk G36, SL8 0,1 (Safe & Fire) Only Compatible With: 0,1 or S,F only: HK UMP HK USC HK G36 HK SL8

HK USC Lower Locking Lever Axle A great item to have on hand as spares. New German HK. Compatible With: All USC lowers

HK UMP & G36 Right Safety Selector Lever For All 3 Position Lowers Only  

H&K USC/SL8 (.45 ACP/5.56/.223) Hammer

HK G36, SL8, USC, & UMP Compression Spring For Index Plate - Lower  

HK Complete Sear G36, UMP, USC, SL8 Made in the USA Compatible With: HK UMP HK USC HK G36 HK SL8

HK UMP & USC Right Side Hammer Spring For Lowers

HK G36 & UMP Slide For 3 Position Burst Only Lowers - 0,1,2 Only  Compatible With: HK UMP HK G36    

HK Ratched Wheel Notched Disk For 3 Position Lowers Compatible With: HK G36 HK UMP

H&K USC Incomplete Trigger Housing - Used This is a used German HK USC lower receiver housing, sold empty. Perfect for spare parts or as a replacement component for your build. Compatible With: HK USC THIS CLOSEOUT PART IS NOT ELIGIBLE FOR RETURN,...