CMMG Bolt Carrier Group MK3 .308 – AR-10 Pattern Rifles

The CMMG MK3 Bolt Carrier Group is engineered for .308 Winchester/7.62 NATO AR-10 pattern rifles, delivering the reliability required for high-pressure large-frame platforms. Whether you're building a precision rifle from scratch, replacing a worn BCG, or keeping a spare on hand, this carrier group provides consistent cycling and extraction in DPMS-pattern rifles chambered in .308 Win and 7.62 NATO.

Manufactured from mil-spec materials with a phosphate finish for corrosion resistance and reduced friction, this BCG features proper staking and a chrome-lined interior for extended service life. The MK3 BCG is designed as a drop-in component for DPMS/SR-25 pattern lowers and uppers, though headspace should always be verified when installing any bolt carrier group, especially in mixed-manufacturer builds or when replacing existing components.

• Part Type: Bolt Carrier Group
• Compatible Firearms: AR-10/DPMS Pattern .308 Win/7.62 NATO Rifles
• Material: Mil-Spec Steel
• Finish: Phosphate
• Installation: Drop-In (Headspace Verification Recommended)
• Includes: Bolt, Carrier, Gas Key, Cam Pin, Firing Pin, Retaining Pin