The CMMG Dissent MK4 is a semi-automatic pistol chambered in 5.7x28mm, built on a 7075-T6 aluminum receiver with a coyote tan Cerakote finish. The 6.5" barrel sits in a 14.70" overall package. It ships with a 32+1 capacity magazine and weighs 4.6 lbs. 
 

Key Specifications 

• Brand: CMMG 
• Model: Dissent MK4 
• Caliber: 5.7x28mm 
• Action: Semi-Automatic 
• Barrel Length: 6.5 inches 
• Overall Length (OAL): 14.70 inches 
• Capacity: 32+1 rounds 
• Weight: 4.6 lbs. 
• Receiver Material: 7075-T6 Aluminum 
• Finish: Coyote Tan Cerakote / Black Nitride barrel 
• Sights: Optic Ready 
• Grip Material: Black Polymer 
• Handguards: M-Lok Free-Float 
• Trigger Type: TriggerTech 2 Stage 
   

Features 

The M-Lok free-float handguard keeps the barrel and handguard contact-free, which matters for repeatable accuracy. The TriggerTech 2-stage trigger is a meaningful spec. It's not a generic mil-spec unit. Ambidextrous safety accommodates either-hand operation. The optic-ready configuration accepts standard mounting hardware. The black nitride barrel finish handles wear and corrosion well. 
 

Use Cases 

The 5.7x28mm is a low-recoil, high-velocity round that makes the 32+1 capacity practical to run fast. The platform sits between a pistol and a PDW in terms of size and role, useful for home defense where the short overall length matters, and enjoyable at the range for high-volume shooting where the low recoil keeps things comfortable. The Cerakote finish handles field and carry conditions.

The CMMG Dissent MK4 in 5.7x28mm gets a generally positive reception, driven largely by enthusiasm for the 5.7x28mm cartridge and the platform's compact configuration. Owners appreciate the short overall length for a 32-round-capacity gun, and the low recoil of the caliber is regularly mentioned as a reason it's fun to shoot in volume.

The coyote tan Cerakote finish is well-liked visually. The TriggerTech 2-stage trigger comes up positively. Users who've handled other CMMG products or similar PDW-style guns note it as a step above baseline.

The consistent criticism is ammunition cost and availability. 5.7x28mm is pricier than 9mm and less stocked at typical retailers, which limits how much owners actually shoot it. Aftermarket accessories and holsters specific to the Dissent MK4 are also thin compared to more established platforms. Some potential buyers weigh those practical limitations heavily when comparing it to 9mm alternatives at a similar price.