| Platform | Mk9, Mk17, MkGs |
| Caliber | 9mm |
| 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, 9mm
Whether you're building a new Radial Delayed Blowback™ AR or you just like having spare BCGs on hand, the 9mm MkGs bolt carrier group is just the thing.
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.