Faxon Firearms Superfinished 5.56 Nato Bolt Carrier Group M16 Chrome Chrome. 56 Gunner Lightweight Bolt Carrier Group - Chromea premium upgrade designed for enhanced performance reliability and reduced weight. Engineered with precision and crafted from high-strength 9310 tool steel this bolt carrier group (BCG) delivers exceptional durability while keeping weight to a mere 8.5 ounces making it one of the lightest options without compromising strength or function. The chrome finish with a hardness of 68-72 HRC provides outstanding wear resistance ensuring long-lasting performance under high-round-count conditions. This non-porous low-friction coating enhances corrosion resistance protecting against moisture salt and harsh environments while also minimizing carbon buildup for effortless cleaning. The slick surface reduces friction resulting in smoother cycling and faster follow-up shots making it ideal for rapid-fire and dynamic shooting scenarios. The Gunner Lightweight design features an optimized cam path and forward assist serrations for confident easy operation ensuring reliable action even with high-pressure hand loads or fast lightweight actions. Fully MPI-tested bolts with 45-degree chamfered lugs guarantee material integrity and flawless performance. The assembly is Superfinished to further reduce friction enhance smoothness and minimize fouling while the gas key secured with grade 8 fasteners and fully staked ensures lifelong reliability. Compatible with all mil-spec AR-15 rifles and dust covers this full-auto-rated BCG maintains the trip sear for full-auto fire control groups and multi-stage trigger systems. Installation is quick and straightforward making it an excellent choice for professional shooters hunters and enthusiasts alike. Laser-engraved with the Faxon Shield as a mark of quality this BCG reflects our commitment to excellence. Faxon recommends pairing the Gunner Lightweight Bolt Carrier Group - Chrome with an adjustable gas block for optimal function. Upgrade your rifle with the Faxon 5.56 Gunner Lightweight Bolt Carrier Group - Chromewhere lightweight design meets unyielding durability and precision performance. Specifications for Faxon Firearms Superfinished 5.56 Nato Bolt Carrier Group: Manufacturer: Faxon Firearms Color: Chrome Finish: Nitride Caliber: 5.56x45mm NATO Package Contents: Faxon Firearms Superfinished 5.56 Nato Bolt Carrier Group Faxon Firearms FF556BCGCNITRIDE-CR: Superfinished 5.56 Nato Bolt Carrier Group M16 Chrome Chrome