The CMMG Full-Auto M16 5.56 bolt carrier group is complete, ready to use with Milspec phosphate coating finish. The Bolt is a 9310 alloy.
This is CMMG’s bolt carrier group in full auto version (legal in all rifles). The carrier is 8620 and chrome lined internally.
Machined to USGI Military specifications. This M16/M4 carrier includes the proper Mil-Spec gas key and stainless teel firing pin.
The gas key is chrome lined and heat treated per GI specifications.
These properly hardened parts insure a strong staking and proper gas