| Platform | Mk10 |
| Caliber | 10mm |
| Operating System | Radial Delayed Blowback |
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Bolt Carrier Group, Mk10
Whether you're building a new Radial Delayed Blowback™ pistol caliber carbine or you just like having spare BCGs on hand, the 10mm 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.
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