The CMMG Dissent MK4 is a compact AR-style pistol chambered in 5.56x45mm NATO. At 4.60 lbs with a 6.50" barrel and 14.7" overall length, it is one of the smaller AR-pattern pistols on the market. Capacity is 30+1 rounds. 
 

Key Specifications 

• Model: Dissent MK4 
• Caliber: 5.56x45mm NATO 
• Action: Semi-Auto 
• Barrel Length: 6.50 inches 
• Overall Length: 14.7 inches 
• Capacity: 30+1 rounds 
• Weight: 4.60 lbs 
• Grip Material: Black Polymer 
• Sights: Optic Ready 
• Safety Feature: Ambidextrous 
   

Features 

The rail system accepts a range of optics without modification. The ambidextrous safety selector works for left- and right-handed shooters without requiring swaps or adapters. The short barrel keeps overall length down, which matters in the compact pistol format. 
 

Usage 

The short OAL makes it easy to move in confined spaces, which suits home defense or range use where a full-length carbine would be awkward. Competitive shooters running pistol classes also find the compact form factor useful.

The CMMG Dissent MK4 in 5.56 NATO generates fairly consistent feedback with a few recurring points of contention.

The compact size gets good marks. Users appreciate how easy it is to handle and maneuver, and the ambidextrous controls come up often as a genuine plus for left-handed shooters. Build quality and reliability are generally reported as solid, and accuracy and recoil management get positive mentions at typical range distances.

On the critical side, price comes up as a friction point. Some users feel it sits high compared to similar compact AR pistols. A few note it feels heavier than they expected given the size. Aftermarket support is another occasional complaint, with some owners wishing for more customization options.

Overall the sentiment tilts positive, particularly around design and handling, though the cost-to-value question keeps showing up in comparisons.