Description
H&K HK416, MR556 Semi-Auto Hammer – Complete
Genuine German complete hammer and spring assembly.
Includes:
- Semi-auto hammer
- Hammer spring
- Side bushing
Compatible With:
- MR556A1
- MR556 A4
- HK416
- AR-15
- AR-15 style semi-auto firearms chambered in 5.56 or .223
