• Caliber: 5.56 NATO / .223 / .300 BLK compatible
  • Carrier profile: Full-mass M16
  • Bolt: 9310 tool steel, MPI, shot-peened, full mil-spec heat treat
  • Finish: Salt-bath nitride (bolt + carrier)
  • Extractor: S7 tool steel with spring, insert, and Crane O-ring installed

Full details and secure checkout: https://3crtactical.com/faxon-5-56-m16-black-bolt-carrier-group/?utm_source=armslist&utm_medium=referral&utm_campaign=listing