| Platform | Mk3 |
| Caliber | .308 WIN |
| Operating System | Compact Action-Direct Impingement |
| Barrel Length | 16.1 |
| Barrel Twist | 1:10 |
| Barrel Contour | MT |
| Barrel Material | 4140CM, Nitride Finish |
| Barrel Twist | 1:10 |
| Muzzle Device | CMMG ZEROED Muzzle Brake |
| Muzzle Thread | 5/8 x 24 |
| Gas Port Location | Rifle |
| Gas Block | Adjustable 0.750" |
| Upper Receiver | DISSENT Mk3 7075 T6 Alumunium |
| Hand Guard | CMMG 11" Proprietary |
| Finish | Cerakote or Hard Coat Anodized |
| Charging Handle | Dissent Side Charger - Reversible |
| Receiver Extension | 1913 Picatinny Rail End Cap |
| Weight | 6.2 lbs |
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, DISSENT, Mk3, .308 Win, 16.1"
Built around the .308 cartridge, the CMMG® Mk3 platform is the larger frame foundation for cartridges such as .308 Win. The shorter barrel is for those who are not wanting the longer rifle length.
Utilizing our patent pending direct impingement Compact Action, DISSENT upper groups house the entire action and recoil assembly in the upper receiver resulting in less bulk and length than traditional ARs. The forward non-reciprocating side charger allows for quick bolt operation without coming off target.
All DISSENT Upper groups include a 1913 Picatinny rail end plate to use in place of the lower receiver buffer tube. Upper groups are available in your choice from seven Cerakote finish options.
Adjustable Gas Block
If you’re looking to shoot suppressed or just fine tune your DISSENT to your preferred ammo, the adjustable gas block gives you the freedom to dial in the gas system exactly to your liking. Never too much and never too little.
Lifetime Quality Guarantee
We aim to please, that’s why every CMMG product is backed by our Lifetime Quality Guarantee against material and workmanship defects. Learn More.
Mk3 DISSENT upper groups are designed to work with CMMG Mk3 (DPMS LR308 Gen-1 Pattern) lower receivers. Due to design differences, other manufacturers’ LR308 lowers may work but CMMG can only guarantee proper fit and function with Mk3 lower receivers.