| 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" |
Expected to ship within 15-30 business days. AR Parts Notice - State/local restrictions may apply in CT, DC, IL, MA, NJ, NY, or WA. Customers must review our Shipping Policy prior to ordering.
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.