The CMMG Resolute Mk4 in 5.56x45mm (MPN 55A9D0BCT) is a carbine-length AR built on CMMG’s Mk4 platform, chambered in one of the most widely used calibers in the world. CMMG builds the 16.1-inch barrel from 4140 chrome-moly with a nitride finish and a 1:7-inch twist, running a mid-length gas system with a non-adjustable 0.750 gas block. The rifle carries the CMMG ZEROED muzzle brake, ambidextrous charging handle, pistol grip, drop-in trigger, and 60/90-degree safety selector, finished in Coyote Tan Cerakote over the CMMG RipStock on a 6-position Fastback receiver extension. It ships with a 30-round Magpul PMAG. Among AR-platform rifles in the AR rifles category, the Resolute Mk4 favors shooters who want a full suite of ZEROED upgrades on a familiar 5.56 carbine.

Key Specifications

• Chambered in 5.56x45mm with a 1:7-inch rate of twist.
• Features a 16.1-inch nitride-finished 4140 chrome-moly barrel.
• Runs a mid-length gas system with a non-adjustable 0.750 gas block.
• Upper receiver is billet 6061-T6 aluminum; lower is forged 7075-T6.
• Includes the CMMG ZEROED muzzle brake, threaded 1/2×28.
• The stock is the CMMG RipStock on a 6-position Fastback extension.
• The trigger is a CMMG ZEROED drop-in design.
• The safety selector is a CMMG ZEROED 60/90-degree design.
• Feeds from a 30-round Magpul PMAG.
• Finished in Coyote Tan, weighing approximately 6.4 pounds.

Frequently Asked Questions

What stock does this rifle use? The CMMG RipStock on a 6-position Fastback receiver extension.

What finish does this rifle have? Coyote Tan Cerakote.

What magazine ships with this rifle? A 30-round Magpul PMAG.

Buy the CMMG Resolute Mk4 5.56, Coyote Tan

A full suite of ZEROED upgrades on a familiar 5.56 carbine is exactly what the Resolute Mk4 delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.