The CMMG Dissent Mk4 is a semi-auto pistol chambered in 9mm with a 6.5-inch barrel and a 30+1 capacity. It uses CMMG Radial Delayed Blowback operation and has a side-charging handle with an M-LOK handguard. 
 

Key Specifications 

• Brand: CMMG 
• Model: Dissent Mk4 
• Caliber: 9mm 
• Action: Semi Auto 
• Capacity: 30+1 
• Barrel Length: 6.5" 
• Color/Finish: Armor Black 
   

Detailed Features 

• Radial Delayed Blowback operating system 
• 6.5-inch barrel in Armor Black finish 
• Side-charging handle configuration 
• M-LOK handguard for accessory attachment 
• 30+1 round capacity

Owners of the CMMG Dissent Mk4 in 9mm frequently point to the Radial Delayed Blowback system as the standout characteristic. The softened felt recoil compared to straight blowback pistol-caliber designs is the most common positive note, and most find it runs reliably across a range of 9mm ammunition.

The side-charging configuration divides opinions. Those who prefer it find it more intuitive coming from AR-pattern rifles, but some users note it requires adjusting muscle memory, especially for lefties or those running the platform in close-quarter configurations.

The Dissent Mk4 sits at a premium price point for the pistol-caliber category, and that is the most common complaint. Most owners feel the build quality and the CMMG operating system justify the cost, but buyers on a tighter budget often weigh it against direct-blowback competitors that cost less. The M-LOK handguard and the Armor Black finish generally draw no complaints.