Long barrel? Who needs that? Thanks to the quick 1:3 twist rate 8.6 BLK does with less barrel length what other calibers could only dream of. Great for someone wanting to swap uppers to shoot 8.6 BLK or for those wanting to start a new build. The CMMG® Mk3 platform is based on the popular DPMS Gen 1 high-pattern LR308 design. Check out our CMMG Resources article to learn more about the Mk3 platform. Available in different Cerakote finishes, all CMMG® Upper Groups come complete with bolt carrier group and ZEROED™ accessories including:
ZEROED Polymer Dust Cover .308
ZEROED AR10/Mk3 Ambi Charging Handle
| Platform | Mk3 |
| Caliber | 8.6 BLK |
| Operating System | Direct Impingement |
| Barrel Length | 12.5 |
| Barrel Twist | 1:3 |
| Barrel Contour | MT |
| Barrel Material | 4140CM, SBN |
| Muzzle Device | CMMG ZEROED SVB Brake |
| Muzzle Thread | 5/8 x 24 |
| Gas Port Location | Pistol |
| Gas Block | Adjustable .750" |
| Upper Receiver | Billet 7075 T6 Aluminum |
| Hand Guard | EML11 M-LOK |
| Finish | Cerakote |
| Charging Handle | CMMG ZEROED Ambi |
| Weight | 5.1 lbs |
