A CMMG firing pin for the Mk9, CMMG's 9mm AR-pattern platform. The firing pin strikes the primer when the hammer falls, and a worn or damaged pin can cause light strikes. Use this factory part when servicing or rebuilding a Mk9 bolt. Compare the fitment details below with your firearm before ordering.
- Brand: CMMG
- Type: Firing pin
- Fits: CMMG Mk9
