The Faxon 5.56 M16 Bolt Carrier Group, Nitride, is a rugged, performance-focused upgrade for AR-15 platforms and M16-style rifles. Built with a 9310 tool-steel bolt and salt-bath nitrided bolt and carrier, this BCG raises the bar beyond basic mil-spec by combining increased surface hardness, superior corrosion resistance, and reduced friction for smoother, more reliable cycling in harsh environments. Whether you're running a duty rifle, precision build, or a hard-used range gun, the Faxon BCG delivers consistent function with long-term durability. Faxon treats "MIL-SPEC" as the baseline and improves where it matters-material selection, surface treatment, and finish quality. The 9310 bolt is fully heat-treated and MPI-inspected to ensure structural integrity under high-pressure use. Salt-bath nitriding hardens surfaces and lowers friction compared with traditional chrome or phosphate finishes, while superfinishing reduces bedding and fosters buttery operation. Bolt lugs are chamfered for reliable lockup, gas keys use Grade 8 fasteners and are fully staked for permanence, and the carrier is shot-peened and MPI tested to meet demanding service conditions. Specifications: Bolt material: 9310 tool steel (fully heat-treated) Finish/Treatment: Salt-bath nitrided bolt and carrier (nitride) Testing: Magnetic Particle Inspection (MPI) on all bolts; shot-peened to MIL-SPEC Extractor: S7 steel extractor (with spring, insert & "Crane" O-ring installed) Compatibility: Full M16/AR-15 platform compatibility; full-auto rated (maintains full-auto trip) Carrier: Superfinished carrier body to reduce friction and fouling Gas key: Grade 8 fasteners, fully staked for lifetime service Features: Back of lugs chamfered 45Adeg for reliable engagement; forward assist serrations included Get it at Battlehawk Armory!