UPPER GROUP, RESOLUTE, Mk4, 300BLK, 16.1"
Originally created for use in subsonic/suppressed applications, .300 BLK has evolved into a very capable caliber, available in a variety of subsonic and supersonic loadings. Whether it’s hunting, personal defense, or target shooting, this .300 BLK RESOLUTE® Upper Group is just the thing to finish your next carbine build. This upper is designed to work with any standard AR15 lower. Available in different Cerakote finishes, all CMMG® Upper Groups come complete with bolt carrier group and ZEROED ambi charging handle.
We aim to please, that’s why every CMMG product is backed by our Lifetime Quality Guarantee against material and workmanship defects. Learn More.
Specifications
| Platform | Mk4 |
| Caliber | .300 BLK |
| Operating System | Direct Impingement |
| Barrel Length | 16.1 |
| Barrel Twist | 1:7 |
| Barrel Contour | MT |
| Barrel Material | 4140CM, SBN |
| Muzzle Device | CMMG ZEROED Muzzle Brake |
| Muzzle Thread | 5/8 x 24 |
| Gas Port Location | Carbine |
| 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 | 4.1 lbs |
| Length | 25" |