| Platform | MkGs |
| Caliber | .40 S&W |
| Operating System | Radial Delayed Blowback |
AR Parts Notice - State/local restrictions may apply in CT, DC, IL, MA, NJ, NY, or WA. Customers must review our Shipping Policy prior to ordering.
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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