ASK AN EXPERTDescription
- CMMG Mk4 Upper Receiver
- 15in CMMG EML15 Handguard
- CMMG A2 Flash Hider
- 16.1in Salt Bath Nitrided 4140 Chrome Moly Steel Barrel
- CMMG .750in Low-Profile Gas Block
- Carbine-Length Gas Tube
- Charging Handle Not Included
- Bolt Carrier Group Not Included
Whether you're starting a new build or just adding some variety to your collection, the CMMG Resolute Mk4 .300 Blackout 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.
Warranty Information
| Platform | Mk4 |
| Caliber | .300 BLK |
| Operation System | Direct Impingement |
| Barrel Length, in | 16.1" |
| Barrel Twist | 1:7 |
| Barrel Contour | MT |
| Barrel Material | 4140CM, SBN |
| Muzzle Device | CMMG A2 Flash Hider |
| Muzzle Thread | 5/8x24 |
| 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 |
| Length, in | 25" |
| Weight, lbs | 3.4 |
