UMP / USC Small Parts

HK UMP & USC Right Side Hammer Spring For Lowers - USA

HK UMP Release Lever Spring For All UMP Lowers  

HK UMP Firing Pin - Retainter Pin   This is the pin that trips the trip lever on the UMP lower.   Compatible With: HK UMP  

USA HK UMP Left Hammer Spring New U.S hammer spring- left side 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 models 45, .40 & 9mm USC .45 and other...

HK UMP & USC Bolt Catch For Last Round Hold Open New HK USA lower bolt catch. Compatible With: HK UMP HK USC

HKP Cocking Handle Assembly for HK USC, UMP Complete cocking handle assembly for HK USC and HK UMP platforms. US-made and built to factory-spec dimensions and includes all required components for proper function and replacement. Includes: Steel cocking...

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

HKP HK UMP Floor Plate Compatible With: UMP .45 UMP .40 UMP 9mm These can become cracked or broken with use or drops onto hard surfaces. Made in the USA and counts as 1 US compliant part.

HKP HK UMP/USC 4 Piece M-Lok Set - Anodized  Upgrade your UMP and USC with the HK Parts 4-piece M-Lok set, designed to eliminate the hassle of snagging and shredding your knuckles on Picatinny rails. This exceptional set significantly expands the...

Stock Block B Sling Pin With Loop washer & Quick Pull Pin for UMP/USC (.40 S&W/ .45 ACP/9mm)   

HK UMP .45 Magazine Locking Plate   Made in the USA

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