| Platform | Mk4 |
| Caliber | 5.56x45mm |
| Operating System | Compact Action-Direct Impingement |
| Barrel Length | 6.5 |
| Barrel Twist | 1:7 |
| Barrel Contour | MT |
| Barrel Material | 4140CM, SBN |
| Barrel Twist | 1:7 |
| Muzzle Device | CMMG ZEROED Blast Compensator |
| Muzzle Thread | 1/2 x 28 |
| Gas Port Location | Pistol |
| Gas Block | Adjustable .750" |
| Upper Receiver | DISSENT 7075 T6 Aluminum |
| Hand Guard | CMMG 5.5" Proprietary |
| Finish | Cerakote |
| Charging Handle | DISSENT Side Charger - Left |
| Buffer Type | N/A |
| Receiver Extension | 1913 Picatinny Rail End Cap |
Expected to ship within 10 business days. Build to Order products are items that are not built but all components are in stock and ready for assembly.
THIS PRODUCT IS BACKED BY THE CMMG LIFETIME QUALITY GUARANTEE.
UPPER GROUP, DISSENT, Mk4, 5.56MM, 6.5"
Coming in with a barrel length of just 6.5” this DISSENT® upper group is one of the shortest 5.56mm available to date. Packing all the power of 5.56 in a platform this size doesn't mean giving up usability. A forward non-reciprocating side charger lets you charge the weapon without coming off target and the M-LOK® handguard with top picatinny rail provides ample mounting locations for accessories. Style your DISSENT upper group to you with one of seven different Cerakote finishes.
It’s no secret that pistol stabilizing braces have been a target for scrutiny over the years, and those that enjoy building their own AR pistols have wondered what will come out of all the uncertainty. DISSENT is our answer. 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 AR pistols.
DISSENT Upper groups include a 1913 Picatinny rail end plate to use in place of the lower receiver buffer tube.
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.
*NFA Rules May Apply
6.5" DISSENT upper groups are made to be used in a pistol configuration, using a pistol upper in conjunction with a stock or stabilizing brace on the lower receiver may make your DISSENT an SBR and subject to NFA rules. Learn more about NFA rules.