| Platform | Mk4 |
| Caliber | .300 BLK |
| Operating System | Direct Impingement |
| Barrel Length | 16.1 |
| Barrel Twist | 1:7 |
| Barrel Contour | MT |
| Barrel Material | 4140CM, SBN |
| Barrel Twist | 1:7 |
| Muzzle Device | CMMG A2 Flash Hider |
| Muzzle Thread | 5/8 x 24 |
| Gas Port Location | Carbine |
| Gas Block | 0.750 Non-Adjustable |
| Upper Receiver | Billet 6061 T6 Aluminum |
| Hand Guard | CMMG EML15 M-LOK |
| Finish | Cerakote |
| Charging Handle | Not Included |
| Weight | 3.4 lbs |
| Length | 25" |
Due to high demand and supply chain issues affecting many industries, some of our parts and accessories may be on backorder and have an extended lead time. Items currently on backorder can still be purchased and can typically be shipped within 25 business days.
UPPER GROUP, RESOLUTE, Mk4, 300BLK, 16.1", No BCG or Charging Handle
Whether you're starting a new build or just adding some variety to your collection, this 300BLK RESOLUTE® Mk4 Upper Group comes assembled minus the BCG and charging handle. Personalize the upper to match your setup with one of the multiple Cerakote options available.
We aim to please, that’s why every CMMG product is backed by our Lifetime Quality Guarantee against material and workmanship defects. Learn More.