Faxon AR-15 Bolt Carrier Group 6.5 Grendel, 6mm ARC, 22 ARC, 338 ARC Nitride Black

The Faxon Bolt Carrier Group is "superfinished" to reduce friction, fouling, and increase smoothness of operation. The BCG's are full-auto rated and maintain the trip for full-auto fire control groups and new multi-stage trigger systems. Gas keys use grade 8 fasteners and are fully staked for a lifetime of service. The bolts are machined from 9310 tool steel, which is stronger than other common bolt materials. The bolt is also nitrided which increases the surface hardness, decreases resistance,