• Caliber: 5.56 NATO / .223 / .300 BLK
  • Carrier profile: Full-mass M16
  • Finish: Nickel Boron coating inside and out (bolt, carrier, and gas key)
  • Markings: Laser-engraved ST Spider logo
  • Inspection: MPI bolt, HPT, gas key staked

Full details and secure checkout: https://3crtactical.com/spikes-bcg-5-56-ar-15-bolt-carrier-group-nib-363749/?utm_source=armslist&utm_medium=referral&utm_campaign=listing