The Resolute MK4 is a semi-automatic rifle chambered in 300 AAC Blackout. It combines a set of practical features that work well for both range sessions and field use. 
 

Key Specifications 

• Model: Resolute MK4 
• Caliber: 300 AAC Blackout 
• Action: Semi-Auto 
• Capacity: 20 rounds 
• Barrel Length: 16.1 inches 
• Handedness: Right Hand 
• Finish: Bronze 
   

Detailed Features 

 
The ZEROED Drop-In Trigger delivers a smooth pull that helps with both accuracy and follow-up shots. Ambidextrous controls, including the ZEROED Ambi Safety and Ambi Charging Handle, make the rifle equally usable for right- and left-handed shooters. The ZEROED Pistol Grip and Trigger Guard keep handling comfortable during extended sessions. An extended mag release button speeds up reloads without fumbling. The 308 WIN muzzle brake cuts recoil noticeably, helping shooters stay on target during rapid fire. 
 

Usage Scenarios 

 
The 16.1-inch barrel and 300 Blackout chambering work well for home defense, where the caliber limits overpenetration compared to larger rifle cartridges. At the range, the trigger and ergonomic controls give competitive shooters an edge in events where speed and accuracy both matter. For hunting, the barrel length keeps the package handy in dense terrain while the caliber handles small to medium game.

The CMMG Resolute MK4 in Bronze chambered for .300 AAC Blackout draws generally positive feedback, with a few recurring points of discussion.

The build quality is widely appreciated, and the bronze finish tends to get specific attention. It reads differently from the typical black rifle and people either like it or don't, though most who buy it seem to be fans. The rifle is reported as reliable across a range of .300 Blackout loads, with subsonic performance mentioned most frequently.

.300 AAC Blackout's ability to run both supersonic and subsonic ammunition is a common reason people choose this platform, and the Resolute MK4 handles both well according to most owners. The ambi controls and adjustable stock get positive marks for ergonomics. Owners who have had to reach CMMG's customer service generally report good experiences, though a few negative warranty interactions show up in discussions. Price is occasionally flagged as a consideration against competing options, though most buyers feel the features justify it.