| Platform | Mk3 |
| Caliber | 8.6 BLK |
| Operating System | Direct Impingement |
| Barrel Length | 16.1 |
| Barrel Twist | 1:3 |
| Barrel Contour | MT |
| Barrel Material | 4140CM, Nitride Finish |
| Barrel Twist | 1:3 |
| Muzzle Device | CMMG ZEROED Muzzle Brake |
| Muzzle Thread | 5/8 x 24 |
| Gas Port Location | Carbine |
| Gas Block | Adjustable 0.750" |
| Upper Receiver | Billet 7075 T6 Aluminum |
| Hand Guard | CMMG EML15 M-LOK |
| Finish | Cerakote |
| Charging Handle | CMMG ZEROED Ambi |
Expected to ship within 15-30 business days.
State/local restrictions may apply. Please review our Firearms Shipping Policy prior to ordering.
Upper Group, RESOLUTE, Mk3, 8.6 BLK, 16.1"
If you had to describe 8.6 BLK in one word it would "Versatile". 8.6 BLK learned from the successes of it's smaller older brother 300 BLK, lending itself very well to subsonic suppressed use and excelling with supersonic ammo when hitting the target hard matters.
There can be a lot of confusion with .308 AR platforms and compatibility, CMMG has kept it simple by basing our Mk3 platform off the popular Gen 1 DPMS High-Pattern LR308 design, which means greater parts availability and more customization potential. Available in seven different Cerakote finishes, all CMMG® Upper Groups come complete with bolt carrier group and ZEROED™ accessories including:
ZEROED AR10/Mk3 Ambi Charging Handle
ZEROED Muzzle Brake 8.6 BLK
We aim to please, that’s why every CMMG product is backed by our Lifetime Quality Guarantee against material and workmanship defects. Learn More.