Noveske M16/M4 6mm ARC Small Frame Phosphate Chrome Lined Gas Key & Carrier Bore Noveske Cross Engraved DLC Bolt Carrier Group 5002875

The Noveske M16/M4 6mm ARC Enhanced DLC Bolt Carrier Group is a premium, full-auto-profile internal component group meticulously engineered for small-frame AR-15 platforms. Built using domestic, aircraft-grade proprietary 8620 steel for the carrier and shot-peened SAE 9310 steel for the bolt, it undergoes strict magnetic particle testing to ensure ultimate failure resistance under heavy cycling. The carrier exterior is treated with a specialized Diamond-Like Carbon (DLC) finish that yields exceptional hardness and an incredibly low friction coefficient, allowing the system to run reliably even with minimal lubrication. Internally, it features a chrome-lined carrier bore and a chrome-lined USGI-spec gas key secured with Grade 8 fasteners, which are precision-staked to effectively manage gas pressure inside modern 6mm ARC setups. Finished with an engraved Noveske Iron Cross logo on the side of the carrier, this drop-in BCG also incorporates optimized lug geometries and controlled ejector tolerances to completely mitigate premature bolt wear and case head extrusions.