The CMMG Resolute Mk4 .22 ARC rifle in Midnight Bronze Cerakote (brand part no. 28A670C-MB) is a modern small-bore AR for range sessions and varmint control. It pairs a 16.1-inch barrel with a ZEROED SVB muzzle brake and a 10-round magazine. CMMG builds it on the Resolute carbine-length platform with the EML15 M-LOK handguard and the RipStock, finished in Midnight Bronze. The ZEROED drop-in single-stage trigger, ambidextrous 60/90-degree safety and ambi charging handle are fitted as standard. It is a straightforward, ready-to-run .22 ARC AR rifle for shooters who want the factory ZEROED parts without building one.

Key Specifications

• Chambering is .22 ARC, which sets the ammunition this Mk4 build is designed around.
• The barrel is 16.1 inches long and made from 4140 chrome-moly steel, a carbine-length profile that keeps the rifle compact.
• Rifling twist is 1:7, the rate CMMG specifies for this chambering.
• A ZEROED SVB muzzle brake is installed from the factory, so the rifle arrives with its muzzle device already fitted.
• The muzzle is threaded 1/2×28, the pitch to match when you choose a different muzzle device.
• Magazine capacity is 10 rounds, and the rifle ships with a CMMG magazine.
• The action is direct impingement with an adjustable gas block, so the gas system can be tuned.
• The handguard is the CMMG EML15 M-LOK with M-LOK slots, giving you mounting space for lights, grips and other accessories.
• The stock is the CMMG RipStock on a CMMG 6 Position Fastback with Ambi Sling Plate receiver extension.
• The finish is Cerakote in Midnight Bronze, a hard coating chosen for wear resistance and a consistent look.

Frequently Asked Questions

How many rounds does it hold? It ships with a 10-round magazine (CMMG 10rd), the capacity CMMG lists for this .22 ARC Mk4 rifle.

Does it come with a muzzle brake? Yes. A ZEROED SVB brake is installed on the 16.1-inch barrel, which is threaded 1/2×28 for a different muzzle device if you prefer one.

What are the barrel length and twist? The barrel is 16.1 inches with a 1:7 twist, chambered in .22 ARC.

Buy the CMMG Resolute Mk4 Rifle, .22 ARC, 16.1-Inch, Muzzle Brake, Midnight Bronze, 10-Round

If you want a carbine-length .22 ARC rifle that already carries CMMG’s ZEROED upgrades, this Midnight Bronze Resolute Mk4 is built that way from the factory. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and browse more AR rifles while you are here.