Noticing a lack of good, robust, lightweight BCGs in the marketplace, Faxon® set out to create a Bolt Carrier Group with mil-spec or better constrution, forward assist, and full-auto capability…and it had to weigh as little as possible.
With that, the Gunner Lightweight Bolt Carrier Group was born. As with Faxon's barrels, they selected the QPQ method of salt bath nitride for all carrier components. By coating all parts, the carrier's natural slickness is enhanced—requiring less gas and pressure to operate. The salt bath nitride process also seals components against corrosion while making them fantastically wear-resistant.
Other improvements include the use of 9310 tool steel for the bolt, which is stronger than C158 and other common materials. The nitriding process helps to increase surface hardness, decrease friction resistance, and provide superior corrosion compared to standard chrome and phosphated finishes.
All bolts are fully MPI-tested to ensure the material is sound and without defects. Bolt lugs are chamfered 45° to ensure reliable action for even the highest pressure hand loads and fast lightweight actions. Faxon Bolt Carrier Groups are superfinished to reduce friction, increase smoothness of operation, and reduce fouling. Further, they 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.