The CMMG Resolute MK4 is a semi-automatic rifle built on the AR platform and chambered in .22 ARC. It handles well at the range, works for small game hunting, and is capable enough for home defense. The aluminum receiver keeps the weight at 6.40 lbs, and the six-position RipStock adjustable stock accommodates different shooters. 
 

Key Specifications 

• Model: Resolute MK4 
• Caliber: .22 ARC 
• Barrel Length: 16.1 inches 
• Overall Length: 32.5 inches 
• Capacity: 10 + 1 rounds 
• Weight: 6.40 lbs 
• Action Type: Semi-Auto 
• Finish: Black Armor Cerakote 
• Safety Lever: Ambidextrous Safety Lever 
   

Detailed Features 

 
The direct impingement operating system cycles reliably and keeps recoil manageable for quick follow-up shots. The CMMG Zeroed muzzle brake reduces muzzle rise during rapid fire. Barrel twist is 1:7, which stabilizes a wide range of bullet weights well. 
 
The M-Lok handguard accepts grips, lights, and other accessories without adding bulk to the profile. 
 

Usage 

 
At the range it handles extended sessions without fatigue. For small game, the .22 ARC caliber and 1:7 twist combination give consistent accuracy at varying distances. The ambidextrous safety makes it accessible for both right- and left-handed shooters. Optics are not included but the platform mounts them easily.

Owners of the CMMG Resolute MK4 in .22 ARC generally come away satisfied, with a few recurring themes in their feedback.

Build quality gets consistently positive marks. The materials and fit are solid, and users report confidence in long-term durability.

Accuracy and reliability are the most frequently praised attributes. The rifle cycles dependably across various ammunition types, which makes it genuinely useful for both target work and training.

The lightweight, comfortable handling is a plus for longer sessions, and new shooters in particular appreciate the manageable recoil.

The CMMG platform's modularity is popular with enthusiasts who want to add optics, grips, or other accessories. The M-Lok handguard makes that straightforward.

The .22 ARC caliber draws praise for being cost-effective for practice compared to larger centerfire rounds. It keeps recoil low without sacrificing much at typical shooting distances.

Customer support experiences vary, but most users report that CMMG is responsive when issues come up.

Value relative to comparable AR-platform rifles at this price point is generally rated as good.