CMMG Resolute MK4 .300 AAC Blackout 16.1″

About this product

The CMMG Resolute MK4 is a semi-automatic carbine built on the Mk4 AR15 platform chambered in .300 AAC Blackout. It pairs a 16.1-inch 4140CM barrel with a 1:7 rate of twist and an EML15 M-LOK handguard for a balanced, modular package. The rifle ships with CMMG ZEROED components and a Magpul 30-round PMAG for immediate use out of the box. Finished in coyote tan Cerakote with a CMMG RipStock and ambidextrous controls, this rifle is configured for versatile carbine-length roles including suppressed, subsonic, and supersonic applications.

Key Specifications

• The caliber is .300 AAC Blackout.
• The barrel measures 16.1 inches and is made from 4140CM steel.
• The action is Semi-Auto on a Mk4 AR15 platform.
• The barrel twist rate is 1:7.
• The muzzle device is a CMMG ZEROED Muzzle Brake.
• The magazine capacity is 30 + 1 with a Magpul 30rd PMAG included.
• The handguard is a CMMG EML15 M-LOK with full-length M-LOK slots at the sides and bottom.
• The finish is Cerakote in coyote tan.
• The weight is 6.20 lbs with an overall length of 32.50 inches.
• The stock is a CMMG 6 Position RipStock with a CMMG 6-position receiver extension and ambi sling plate.

Well-engineered and purpose-built, the Resolute MK4 delivers a practical, adaptable carbine package for shooters who prioritize modularity and reliable function. Its combination of ZEROED components, M-LOK mounting options, and a serviceable 16.1″ barrel make it suitable for suppressed subsonic use as well as supersonic carbine roles where .300 AAC Blackout is desired. The CMMG Resolute MK4 offers a balanced platform for a variety of carbine-length needs without unnecessary complexity.

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