Ensure your firearm is functioning smoothly with this Aero Precision AR 15 5.56 NATO Bolt Carrier Group BCG. These Bolt Carrier Groups are available with either nitride or phosphate coatings for extra wear-resistance. Built with an HPT-tested and MPI-marked bolt, this high-quality BCG makes an excellent addition to AR 15 platforms. Buy an Aero Precision AR 15 556 BCG today for guaranteed performance shot after shot. Specifications for Aero Precision AR15 5.56 Bolt Carrier Group (BCG): Manufacturer: Aero Precision Color: Black Fabric/Material: 8620 Steel Cartridge: 5.56x45mm NATO Gun Make: AR Platform Gun Model: AR-15 Condition: New Weight: 11.52 oz Carrier Material: 8620 Steel Country of Origin: USA Features of Aero Precision AR15 5.56 Bolt Carrier Group BCG M16-cut carrier Carrier has forward assist serrations Properly staked gas key Chrome lined gas key and firing pin channel (phosphate model only) Shot peened HPT tested/MPI marked Black o-ring insert on extractor High quality BCG Package Contents: Aero Precision AR15 5.56 Bolt Carrier Group Which weapon models is Aero Precision AR15 5.56 Bolt Carrier Group (BCG) compatible with? Aero Precision AR15 5.56 Bolt Carrier Group (BCG) is compatible with AR-15