Faxon Firearms M16 5.56 Bolt Carrier Group Features The Faxon Firearms Bolt Carrier Group starts with a 9310 tool steel bolt a material chosen over standard carpenter steel for its superior strength and fatigue resistance under repeated firing cycles. Every bolt is magnetic particle inspected to confirm the material is free of defects then fully heat treated and shot peened to MIL-SPEC standards for consistent durability. The back of the bolt lugs is chamfered to support reliable lockup and cycling even with high pressure handloads or fast lightweight recoil systems. An S7 tool steel extractor along with a factory-installed spring insert and Crane O-ring rounds out an assembly built for dependable extraction under demanding conditions. Salt bath nitriding on both the bolt and carrier increases surface hardness and delivers stronger corrosion resistance than typical chrome or phosphate finishes while the Gold Titanium Nitride PVD coating on the carrier and gas key adds further wear resistance and a distinctive appearance. Faxon s superfinishing process smooths the carrier body to reduce friction and fouling making cleaning easier and cycling more consistent over time. The gas key uses grade 8 fasteners that are fully staked for long-term reliability and the M16 carrier pattern maintains compatibility with full-auto fire control groups and many modern trigger systems. This Faxon Firearms Bolt Carrier Group is available for sale at GrabAGun for shooters upgrading an AR-15 or M16 pattern rifle with a proven high-performance component. Faxon Firearms M16 5.56 Bolt Carrier Group Specifications Manufacturer: Faxon Firearms Model: M16 5.56 Bolt Carrier Group Caliber: .223 Rem / 5.56 NATO Color: Gold Material: 9310 Tool Steel Finish: TiN PVD Coated Salt Bath Nitrided Compatible Hosts: AR-15 / M16 Size: Mid-Length Extractor: S7 Steel Features: Magnetic Particle Inspected Full-Auto Compatible Superfinished Carrier Body Available At: GrabAGun