| Platform | Mk3 |
| Caliber | 8.6 BLK |
| Operating System | Compact Action-Direct Impingement |
| Barrel Length | 12.5 |
| Barrel Twist | 1:3 |
| Barrel Contour | MT |
| Barrel Material | 4140CM, Nitride Finish |
| Barrel Twist | 1:3 |
| Muzzle Device | CMMG ZEROED Linear Compensator |
| Muzzle Thread | 5/8 x 24 |
| Gas Port Location | Pistol |
| Gas Block | Adjustable 0.750" |
| Upper Receiver | DISSENT Mk3 7075 T6 Alumunium |
| Lower Receiver | Mk3 Billet 7075 T6 Aluminum |
| Hand Guard | CMMG 11" Proprietary |
| Finish | Cerakote |
| Charging Handle | Dissent Side Charger - Reversible |
| Pistol Grip | CMMG ZEROED Pistol Grip |
| Buffer Type | N/A |
| Receiver Extension | DISSENT Folding Stock Adapter |
| Stock / Brace | DISSENT Side Folding Stock |
| Trigger Type | ZEROED Drop-In Single Stage |
| Trigger Guard | Integrated |
| Safety Selector | CMMG ZEROED 60/90 Degree |
| Magazine | (2) Magpul 20rd PMAG LR/SR |
| Weight | 7.9 lbs |
| Length | 30.4" - 33.4" (24" Folded) |
Please Allow 15-30 Days To Process Your Order.
State/local restrictions may apply in CA, CO, CT, DE, DC, HI, IL, MD, MA, MI, NJ, NY, or WA. Customers must review our Firearms Shipping Policy prior to ordering.
Firearms with attached pistol brace. Please confirm your FFL is accepting transfers for pistol brace equipped firearms prior to ordering.
SBR, DISSENT, Mk3, 8.6 BLK, 12.5"
Joining the faithful pair of calibers is the much anticipated 8.6 BLK, the large frame counterpart to 300 BLK, delivering significant energy on target from shorter length suppressor optimized barrel lengths.
**All NFA rules apply** All DISSENT NFA SBRs (short barrel rifles) require additional ATF paperwork & processing time. See linked CMMG Resource article for more information.
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 or workmanship defects. Learn More.
~Firearms shipping to states with magazine capacity restrictions will only ship with 10rd magazines in place of standard capacity magazines. CMMG does not address any other state compliancy requirements for further restricted states.