The CMMG Dissent MK4 is a semi-automatic pistol chambered in 5.7x28mm. It holds 32+1 rounds, comes ready for an optic, and runs a Black Cerakote finish over a black polymer grip frame. 
 

Key Specifications 

• Model: Dissent MK4 
• Caliber: 5.7x28mm 
• Barrel Length: 6.5 inches 
• Capacity: 32+1 rounds 
• Weight: 4.60 lbs 
• Overall Length: 14.7 inches 
• Finish: Black Cerakote 
• Action Type: Semi-Automatic 
• Safety: Ambidextrous 
• Grip Material: Black Polymer 
• Sights: Optic Ready 
   

Features 

• 5.7x28mm is a high-velocity, low-recoil cartridge that works well for target shooting and personal defense 
• 32-round capacity reduces reload frequency during range sessions or competition stages 
• Optic-ready slide accepts common red dot footprints without modification 
• Ambidextrous safety works for left- and right-handed shooters 
• Cerakote finish handles moisture and wear across outdoor conditions 
   

Usage 

The 14.7-inch overall length and 4.6 lb weight keep it manageable. The 5.7x28mm round's low recoil helps maintain sight picture on fast follow-ups. Ammo cost and availability are the main tradeoffs compared to 9mm; that is worth factoring in for high-volume shooters.

Owners of the CMMG Dissent MK4 5.7x28mm tend to have opinions shaped largely by how they feel about the caliber itself. Those who have shot 5.7x28mm before usually come in enthusiastic: the round is fast, flat-shooting, and noticeably soft on recoil, which shows up in how well people shoot it on timed stages.

The optic-ready setup gets mentioned often as a practical plus. The Black Cerakote finish draws positive comments for durability and appearance.

The recurring complaint is ammo cost and availability. 5.7x28mm runs more per round than 9mm, and it is not stocked everywhere. A few users also wish the balance were different. At 4.60 lbs. with a loaded 32-round magazine, it front-loads noticeably.

Overall, shooters who commit to the 5.7x28mm caliber seem satisfied with the Dissent MK4 as a platform. Those on the fence about the cartridge tend to stay on the fence after handling it.