Bolt Carrier Group, MkGs, 40 S&W, 16" Barrel Compatible

Whether you're building a new Radial Delayed Blowback(TM) 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 16.1.40 S&W barrel. 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. All CMMG products are backed by our Lifetime Quality Guarantee.Learn More.