The CMMG Resolute MK3 is a semi-automatic AR-308 rifle chambered in .308 Win with a 16.1-inch barrel. It comes in a Midnight Bronze finish and has a 20-round capacity. 
 

Key Specifications 

• Brand: CMMG 
• Model: Resolute MK3 
• Caliber: .308 Win 
• Action: Semi Auto 
• Capacity: 20 rounds 
• Barrel Length: 16.1 inches 
• Color/Finish: Midnight Bronze 
   

Detailed Features 

• AR-308 pattern semi-automatic rifle chambered in .308 Win 
• 16.1-inch barrel 
• 20-round magazine capacity 
• Midnight Bronze finish

CMMG Resolute MK3 owners frequently point to the rifle's build quality as a standout, particularly the fit of components and the consistent finish. The .308 Win chambering in an AR-pattern platform draws those who want a large-caliber semi-automatic without stepping outside familiar controls.

At 16.1 inches the barrel is a practical mid-length choice. Some owners note that .308 Win produces significant muzzle blast from this length and recommend a muzzle device, while others find the balance and maneuverability a worthwhile trade. The Midnight Bronze finish gets attention on the range and owners report it holds up reasonably well to field use.

The Resolute MK3 sits in a competitive segment of the AR-308 market. Owners generally find the price justified given CMMG's production standards, though the trigger is a common point of early replacement for those who shoot precision. Magazine compatibility with standard .308 AR magazines is viewed as a practical advantage.