AIM AR/M16 .223/5.56 NiB 9310 MPI BDG Bolt Carrier Group

AIM AR/M16 .223/5.56 complete Nickel Boron Bolt Carrier Groups.We are having these bolts manufactured to our exacting standards with no Frills added to be able to offer the best BCG at the Best Price!Features 9310 Bolt Material; 8620 carrier and gas key; Properly staked Investment cast gas key hardened to USGI specifications fastened with Hardened Grade 8 Fasteners; Shot peened MPI (Magnetic Particle Inspected) Bolt. Extractor insert installed.