CMMG Resolute MK4 5.56 16.1″ Carbine — 30rd

About this product

The CMMG Resolute MK4 is a carbine-length AR-style rifle chambered in 5.56x45mm (.223 Rem/5.56 NATO) built on CMMG’s MK4 platform. It pairs a 16.1″ barrel with a lightweight EML15 M-LOK handguard and the ergonomics of the RipStock for balanced handling. The rifle ships with CMMG ZEROED controls and a 30-round Magpul PMAG for immediate use at the range. Designed to accept standard AR-15 accessories, the Resolute MK4 fits a wide range of practical shooting roles from general-range training to utility carbine applications.

Key Specifications

• Chambered in 5.56x45mm (.223 Rem/5.56 NATO) for widespread ammunition compatibility.
• The barrel measures 16.1 inches for a carbine-length balance of maneuverability and velocity.
• Barrel material is 4140CM SBN for strength and longevity.
• The barrel twist rate is 1:7 to stabilize a wide range of bullet weights.
• Equipped with a CMMG ZEROED Muzzle Brake to manage recoil impulse.
• Featuring a CMMG EML15 M-LOK handguard for accessory mounting and weight savings.
• Includes the CMMG RipStock and CMMG 6-position receiver extension for ergonomic adjustability.
• Standard magazine capacity is 30 rounds with the included Magpul PMAG.
• Operating system is Semi-Auto with direct impingement operation.
• Overall weight is approximately 6.4 lbs for a practical carry/training platform.

Thoughtfully configured from the receiver set to the handguard and furniture, the Resolute MK4 delivers a dependable, modular AR platform that accommodates common upgrades and accessories. Its carbine footprint and CMMG-specified components make it well suited for range work, taktical-style training, and shooters who value adaptable ergonomics and straightforward functionality.

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