The CMMG Dissent MK4 is a semi-automatic pistol chambered in 9mm Luger, built on a compact direct impingement action. The 6.5-inch barrel and 33+1 capacity make it a high-round-count option in a package that stays under 15 inches overall. 
 

Key Specifications 

• Model: Dissent MK4 
• Caliber: 9mm Luger 
• Action: Semi-Auto 
• Barrel Length: 6.5 inches 
• Capacity: 33+1 rounds 
• Safety: Ambidextrous 
• Grips: Black Polymer 
• Sights: Optic Ready 
• Weight: 4.60 lbs 
• Overall Length (OAL): 14.7 inches 
   

Detailed Features 

 
The direct impingement action keeps the design light at 4.60 lbs. A 1:10 barrel twist stabilizes a range of 9mm loads. The ambidextrous safety selector and left-side charging handle work for both right- and left-handed shooters. 
 
The CMMG Zeroed Linear Compensator reduces muzzle rise and redirects blast forward, which helps with rapid follow-up shots. The optic-ready top rail takes red dots or magnified optics without adapters. 
 
At 14.7 inches OAL it maneuvers well in close quarters while the 33-round capacity keeps the round count high for extended use at the range or as a home defense setup.

The CMMG Dissent MK4 draws mostly positive responses, with a few practical concerns that come up repeatedly.

The 33-round magazine capacity is the feature owners mention most. For range use it means fewer reloads, and for defensive purposes it provides a large reserve. Reliability across different 9mm loads is generally reported as good. Users also like the modularity — the platform accepts optics, lights, and grip accessories without much fuss, and the ambidextrous controls are genuinely useful.

The weight is a common point of discussion. At 4.60 lbs. empty it's heavier than it looks, and fully loaded it's noticeably more so. Some owners find recoil management adequate; others think it could be better given the compensator. Price also comes up — the Dissent sits above cheaper PCCs and pistols, which pushes some buyers toward alternatives. Aftermarket accessories specific to this platform are more limited than for more established designs.

Newer shooters occasionally note that the manual of arms takes some getting used to relative to a traditional pistol. Overall, experienced shooters who want a high-capacity 9mm platform with AR-style ergonomics tend to be happy with it; buyers more price-sensitive may want to compare against similar PCC-style pistols first.