The CMMG Dissent Mk4 is a semi-automatic pistol chambered in .300 AAC Blackout with a 6.5-inch barrel in a Coyote Tan finish. It runs on a 30+1 round capacity magazine and includes an ambidextrous safety switch and an optic-ready top rail. 
 

Key Specifications 

• Make: CMMG 
• Model: Dissent Mk4 Pistol 
• Action: Semi-Auto 
• Caliber: .300 AAC Blackout 
• Barrel Length: 6.5 inches 
• Overall Length: 14.7 inches 
• Capacity: 30+1 rounds 
• Weight: 4.60 lbs 
• Finish: Coyote Tan 
• Grip Material: Black Polymer 
• Safety Feature: Ambidextrous safety switch 
• Sights: Optic Ready 
   

Detailed Features 

 
At 14.7 inches overall and 4.60 lbs, the Dissent Mk4 is compact enough to maneuver in tight spaces while the .300 Blackout cartridge performs well both suppressed and unsuppressed. The optic-ready rail makes mounting a red dot or magnified optic a direct installation. Ambidextrous controls let left- and right-handed shooters operate the safety without an awkward reach. The 30+1 capacity provides a meaningful round count before a reload is needed.

Owners of the CMMG Dissent Mk4 in .300 BLK and Coyote Tan generally come away positive. The compact build is the most frequently praised quality. Buyers want something manageable, and the Dissent delivers that at 14.7 inches overall.

Build quality is a recurring topic. The monolithic upper receiver and ambidextrous controls get called out specifically as well-executed features. The .300 Blackout round is popular among this group, particularly for suppressed use where its subsonic performance is a real advantage.

Price is the main friction point. Most buyers feel the quality is there, but some find the cost higher than comparable options and say so plainly. Accessory discussions are common. Optic choices and grip preferences get shared frequently among owners.

The overall tone leans positive, with buyers treating the price as a known quantity rather than a surprise and focusing their conversations on performance and setup.