The CMMG Resolute Mk4 6mm ARC is a carbine-length AR-15 rifle with a 16.1-inch barrel, finished in Coyote Tan Cerakote (CMMG part no. 60AF30CCT). The 6mm ARC cartridge was designed to give AR-15 rifles the flat trajectory and extended range usually associated with larger rounds, which makes this rifle a strong choice for hunters and extended-range target shooters. CMMG fits it with its ZEROED parts, including an ambidextrous safety and charging handle, and its RipStock fastback stock. The result is a feature-packed rifle that handles equally well in the field and on the range.

Key Specifications

• The chambering is 6mm ARC, a flat-shooting cartridge designed to extend the range of the AR-15 platform.
• Barrel length is 16.1 inches in a medium-taper contour of 416 stainless steel, a carbine length that keeps the rifle handy.
• The twist rate is 1:7.5, which stabilizes the heavier bullets common in 6mm ARC.
• The muzzle carries a ZEROED SVB brake on 5/8×24 threads, which helps control recoil and allows other muzzle devices to be fitted.
• The operating system is direct impingement with an adjustable .750-inch gas block, so gas flow can be tuned for the load.
• The receivers are a billet 6061 T6 aluminum upper and a Mk4 forged 7075 T6 aluminum lower, a strong, lightweight pairing.
• The handguard is the CMMG EML15 M-LOK, with M-LOK slots at the 3, 6, 9 and 12 o’clock positions for accessories.
• The finish is Coyote Tan Cerakote, a durable coating that resists wear and weather.
• The stock is the CMMG RipStock on a six-position fastback receiver extension with an ambidextrous sling plate.
• The trigger is a ZEROED drop-in single-stage unit, a crisp, consistent break for accurate shooting.

Frequently Asked Questions

What does 6mm ARC offer over 5.56 in an AR-15? CMMG notes that 6mm ARC was designed to give AR-15 platform rifles ballistic performance that rivals the extended range of larger rounds, making it a good choice for hunters and extended target shooters.

Does this Resolute come with a muzzle device? Yes. It has a ZEROED SVB brake on 5/8×24 threads.

What magazine does it ship with, and how heavy is the rifle? It comes with a CMMG 10-round magazine, and the rifle weighs 6.4 pounds. The safety selector is a ZEROED 60/90 degree ambidextrous unit.

Buy the CMMG Resolute Mk4 6mm ARC Rifle

The Resolute Mk4 in 6mm ARC gives AR-15 shooters a flat-shooting option without moving to a larger platform. See more AR rifles while you are here. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.