HK UMP, USC – Left Side Hammer Spring For All Lowers
New HK German 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.
Fits all:
- HK UMP models 45, .40 & 9mm
- USC .45 and other conversion models
Heckler & Koch, Hammer Spring Left, Fits HK USC/UMP Rifle
- Brand: Heckler & Koch
- Product Code: HKP-01898
- Availability: Out Of Stock
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$23.99 USD