FF556BCGCNITRIDE

Faxon Firearms Bolt Carrier Group5.56NATOFit AR-15Salt Bath Nitride FinishBlackFeatures:9310 Tool Steel BoltFull MIL-SPEC Heat TreatmentShot Peened to MIL-SPECMagnetic Particle Inspection (MPI)Back of Lugs Chamfered for ReliabilitySpring, Insert, & Crane O-Ring…