The CMMG Resolute MK4 is an AR-style rifle chambered in 5.56x45mm NATO with a direct impingement operating system. It runs a 16.10-inch stainless steel barrel finished in black nitride, a 1:7" twist rate, and ships with the CMMG Zeroed muzzle brake. The receiver is aluminum with Coyote Tan Cerakote. Weight is 6.40 lbs; overall length is 32.50 inches. Capacity is 30+1 rounds. 
 

Key Specifications 

• Manufacturer: CMMG 
• Model: Resolute MK4 
• Caliber: 5.56x45mm NATO 
• Gun Platform: AR-Style 
• Operating System: Direct Impingement 
• Capacity: 30+1 rounds 
• Barrel Length: 16.10 inches 
• Weight: 6.40 lbs 
• Overall Length: 32.50 inches 
• Stock Material: Synthetic (Coyote Tan) 
• Action Type: Semi-Automatic 
• Muzzle Device: CMMG Zeroed Muzzle Brake 
• Twist Rate: 1:7" 
• Receiver Material/Finish: Aluminum with Coyote Tan Cerakote 
• Trigger Type: Zeroed Drop-In Single Stage 
   

Detailed Features 

 
The CMMG Zeroed muzzle brake cuts recoil and muzzle rise, which helps with faster follow-up shots. The Picatinny rail receiver gives you mounting options for optics and lights. CMMG's RipStock is six-position adjustable, accommodating different shooting styles and body sizes. The stainless steel barrel in black nitride holds up to wear, and the Coyote Tan Cerakote on the aluminum receiver is a durable corrosion barrier. The trigger is a Zeroed drop-in single-stage unit. 
 

Target Audience 

 
The Resolute MK4 works well for sport shooters who run competitive stages, home defense users who want a familiar AR platform, and anyone interested in modifying their rifle with aftermarket accessories. 
 

Usage Scenarios 

1. Competitive Shooting: The semi-auto action and reduced recoil from the muzzle brake suit courses that demand quick strings of fire. 
2. Home Defense: 30+1 capacity and straightforward AR controls make it practical in a defensive role. 
3. Tactical Training: The standard AR-style configuration fits into most training curricula without adjustment.

The CMMG Resolute MK4 in Coyote Tan gets generally positive feedback. The Coyote Tan finish is one of the first things people mention — it does stand out compared to the usual black, and most find it holds up well. Reliability is a consistent theme: owners report it runs cleanly at the range and holds up in more demanding use.

The 30+1 capacity is appreciated, especially for range sessions where reloads slow you down. At 6.40 lbs it sits in the middle of the AR weight range — not featherweight, but not a burden either.

The price comes up regularly. It costs more than budget AR options, and some users feel that gap is noticeable when comparing specs on paper. For those who value the CMMG-specific features — the Zeroed muzzle brake, RipStock, and Cerakote finish — the cost seems justified. Others find comparable performance for less elsewhere.

Weight and ergonomics get occasional criticism from users planning extended carry, but most find the handling acceptable for range and home defense use.