The CMMG Dissent MK4 is a semi-automatic AR-style rifle chambered in .22 ARC with a 16.1-inch threaded barrel. It comes in a Coyote Tan Cerakote finish with a side-folding stock and ships with two 10-round magazines. The rifle uses the MK4 lower platform and carries model designation 28A490FCT. 
 

Key Specifications 

• Brand: CMMG 
• Model: Dissent MK4 
• Caliber: .22 ARC 
• Action: Semi Auto 
• Capacity: 10 Rounds 
• Barrel Length: 16.1 in 
• Color/Finish: Coyote Tan (Cerakote) 
   

Detailed Features 

• AR-15 pattern semi-automatic rifle on the MK4 lower 
• 16.1-inch threaded barrel 
• Side-folding stock 
• Coyote Tan Cerakote finish 
• Ships with two 10-round magazines

Owners of the CMMG Dissent MK4 in .22 ARC tend to highlight the side-folding stock as a practical feature that sets it apart from standard AR-pattern rifles, making transport and storage more compact. The Coyote Tan Cerakote finish gets consistent praise for its durability and appearance.

The .22 ARC chambering is still relatively new, and owners are divided on ammunition availability. Those who planned ahead for the cartridge are satisfied with the Dissent MK4's performance; others have found sourcing .22 ARC harder than anticipated compared to more established rifle calibers.

CMMG's build quality on the Dissent MK4 draws broadly positive marks for fit and finish, though the trigger is a frequent subject of discussion. Many owners swap it early for a lighter aftermarket unit, while others find the factory trigger acceptable for general use.