The CMMG Dissent MK4 is a semi-automatic 9mm pistol with a 6.50" barrel and a 33+1 capacity. It's built on a 7075-T6 aluminum receiver with a Black Armor Cerakote finish, weighing in at 4.60 lbs and 14.70" overall. The optic-ready top allows direct red dot mounting without an adapter. 
 

Key specifications 

• Brand: CMMG 
• Model: Dissent MK4 
• Caliber: 9mm Luger 
• Barrel Length: 6.50" 
• Capacity: 33+1 rounds 
• Action: Semi-Auto 
• Overall Length: 14.70" 
• Weight: 4.60 lbs 
• Sights: Optic Ready 
• Grip Material: Black Polymer 
• Receiver Material: 7075-T6 Aluminum 
• Safety Feature: Ambidextrous Safety 
   

Features 

 
The Dissent runs on CMMG's radial delayed blowback system, which keeps the bolt carrier group moving rearward at an angle rather than straight back. This reduces felt recoil compared to a straight blowback 9mm of similar size. The M-Lok free-float handguard gives you accessory real estate while keeping weight down. The muzzle compensator reduces muzzle rise during fast strings. Two-stage trigger. Ambidextrous safety works for left-handed shooters without modification. 
 
At 4.60 lbs with a 33-round magazine, this is a substantial pistol, closer in feel to a short-barreled carbine than a conventional handgun.

The Dissent MK4 attracts shooters who want high-capacity 9mm performance in a compact format, and owner sentiment is mostly positive with some recurring criticisms.

The radial delayed blowback system is often the first thing owners mention. It makes the gun noticeably softer to shoot than comparable straight-blowback pistols, which most users consider a real advantage for extended range sessions. The 33-round capacity is a selling point for both range and home defense use. Accuracy reports are good across typical pistol distances. The monolithic upper receiver design draws mixed reactions. Some owners like the clean look and rigidity, others prefer conventional configurations they can swap parts on more easily.

Price is the most consistent complaint. The Dissent MK4 sits at the higher end of the 9mm pistol market, and buyers regularly compare it against PCCs and similarly priced pistols. Aftermarket support and customization options are more limited than for established platforms like Glock or the AR-9 ecosystem. Ergonomics come up occasionally. Most users find it comfortable, but the grip doesn't suit all hand sizes equally. Overall it has a solid following among shooters who want the specific combination of compact size and low felt recoil that the radial delayed system provides.