CMMG Mk3 Bolt Carrier Group 6.5 Creedmoor

CMMG Mk3 6.5 Creedmoor BCG Features The bolt is constructed from 9310 steel and treated with a phosphate finish for increased surface hardness and corrosion resistance. The carrier body is machined from 8620 steel chrome lined internally and phosphate coated for superior wear protection and smooth cycling. This bolt carrier group includes a 0.060 firing pin made from 17-4 stainless steel optimized for high-pressure loads such as 6.5 Creedmoor. An S7 tool steel extractor enhances durability and extraction force making it ideal for high-volume or suppressed shooting. The full-mass design aids in proper function across a range of gas systems and buffer setups. Whether you re building a precision rifle or upgrading an existing platform the Mk3 BCG is purpose-built for consistent function and extended service life. CMMG Mk3 6.5 Creedmoor BCG Specifications Manufacturer: CMMG Model: Mk3 Bolt Carrier Group Platform: Mk3 / LR-308 Caliber: 6.5 Creedmoor Bolt Material: 9310 Steel Bolt Finish: Phosphate Carrier Material: 8620 Steel Carrier Finish: Chrome Lined Phosphate Extractor Material: S7 Tool Steel Extractor Finish: Phosphate Firing Pin Material: 17-4 Stainless Steel Firing Pin Diameter: 0.060 inches Pressure Rating: High-Pressure Design