Product DescriptionThe Faxon Firearms Superfinished 5.56 NATO M16 Bolt Carrier Group (BCG) with TiN PVD coating is a premium AR-15/M16-pattern upgrade built for smooth cycling, dependable extraction, and long-term durability. Starting with MIL-SPEC as a baseline, Faxon enhances key areas with a 9310 tool steel bolt, full MIL-SPEC heat treatment, shot peening, and Magnetic Particle Inspection (MPI) testing. The bolt and carrier are salt bath nitrided to increase surface hardness and corrosion resistance, while the carrier and gas key feature a Titanium Nitride (TiN) PVD coating for enhanced wear resistance and a distinctive finish. Chamfered bolt lugs help promote reliable lockup and function, and the included spring, insert, and "Crane" O-ring support consistent extraction under hard use.Product Highlights Superfinished carrier body helps reduce friction and fouling for smoother operation and easier cleaning 9310 tool steel bolt with MPI testing, MIL-SPEC heat treatment, and MIL-SPEC shot peening Salt bath nitrided bolt and carrier for increased hardness and superior corrosion resistance TiN PVD coated carrier and gas key for enhanced wear resistance and premium finish M16 carrier pattern (full-auto compatible) with forward assist serrations for AR-15/M16 buildsSpecs Brand: Faxon Firearms Product Type: Bolt Carrier Group (BCG) Platform Compatibility: AR-15 / M16 pattern Caliber/Cartridge: 5.56 NATO (commonly used in .223/5.56 builds) Carrier Type: M16 (full-auto compatible) Bolt Material: 9310 tool steel Extractor Material: S7 Testing/Inspection: Magnetic Particle Inspection (MPI) Heat Treatment: Full MIL-SPEC heat treatment Shot Peened: To MIL-SPEC Surface Treatment: Salt bath nitrided bolt and carrier Coating/Finish: TiN (Titanium Nitride) PVD coated carrier and gas key Other Features: Chamfered bolt lugs; spring, insert, and "Crane" O-ring installed; forward assist serrations UPC: 816341024632 Manufacturer Part Number: FF556BCGCNITRIDE-TiNDisclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product's manufacturer.