CMMG BCG AR15 6.5 Grendel/6mm ARC – Bolt Carrier Group for AR-15 Platform

The CMMG 6.5 Grendel/6mm ARC Bolt Carrier Group is engineered specifically for AR-15 platform rifles chambered in 6.5 Grendel or 6mm ARC. These cartridges require a bolt face and carrier geometry different from standard 5.56/.223 configurations, and this BCG delivers the proper headspacing and extraction needed for reliable cycling with these larger-case intermediate cartridges. If you're building or converting an AR-15 for long-range precision or hunting with 6.5 Grendel or 6mm ARC, this is a required component.

Manufactured from 8620 steel with a phosphate finish, this carrier group is built to CMMG's mil-spec standards for durability and consistent function. The bolt is properly sized for the Grendel/ARC case head and features the correct extractor and ejector configuration. Installation is drop-in for any mil-spec AR-15 upper receiver, though proper headspacing should always be verified when assembling a new barrel and bolt combination.

• Part Type: Bolt Carrier Group
• Compatible Firearms: AR-15 platform rifles chambered in 6.5 Grendel or 6mm ARC
• Material: 8620 steel carrier and bolt
• Finish: Phosphate
• Installation: Drop-in (verify headspacing with barrel)
• Includes: Bolt carrier, bolt assembly, gas key, cam pin, firing pin, firing pin retaining pin