CMMG Bolt Carrier Group, MkGs, 40 S&W, 5″ & 8″ Barrel Compatible

Bolt Carrier Group, MkGs, 40 S&W, 5″ & 8″ Barrel Compatible

Whether you’re building a new Radial Delayed Blowback™ pistol caliber carbine or you just like having spare BCGs on hand, the 40 S&W bolt carrier group is just the thing. This BCG is designed specifically for use with our 5″ and 8″ .40 S&W barrels. 

Compatibility: CMMG Radial Delayed Blowback BCGs are desgined exclusively to operate with CMMG Radial Delayed Blowback barrels and will not operate with traditional AR style barrel extensions.

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