Description
Heckler and Koch Hammer for HK MR556 Semi-Auto rifles
Factory-original German steel hammer for MR556 A4 rifles. Designed as a direct replacement for worn or damaged hammers in MR556 A1 and A4 trigger assemblies.
Compatible With:
- MR556A1
- MR556 A4
- HK416
- AR-15
- AR-15 style semi-auto firearms chambered in 5.56 or .223
Please Note: This offering does not include the hammer spring and side bushing.
