Chambered in 6mm ARC, this RESOLUTE® Upper Group is designed to pair with any standard AR15 pattern lower group. Harness the capability of 6mm in this uniquely designed RESOLUTE 16.1” upper. Available in seven different Cerakote finishes, all CMMG® Upper Groups come complete with bolt carrier group and ZEROED™ accessories including:
| Platform | Mk4 |
| Caliber | 6mm ARC |
| Operating System | Direct Impingement |
| Barrel Length | 16.1 |
| Barrel Twist | 1:7.5 |
| Barrel Contour | MT |
| Barrel Material | 416SS, SBN |
| Muzzle Device | CMMG ZEROED Muzzle Brake |
| Muzzle Thread | 5/8 x 24 |
| Gas Port Location | Rifle |
| Gas Block | Adjustable 0.750" |
| Upper Receiver | Billet 6061 T6 Aluminum |
| Hand Guard | CMMG EML15 M-LOK |
| Finish | Cerakote Standard |
| Charging Handle | CMMG ZEROED Ambi |
| Weight | 4.3 lbs |
| Length | 25" |
