CMMG RESOLUTE MK4 5.7X28 16.1 COYOTE TAN

The CMMG RESOLUTE Mk4 is a carbine-length AR platform chambered in 5.7x28mm that emphasizes modularity and light handling. This configuration uses CMMG’s generation of 5.7 magazines that fit standard AR-15 magwells and ships with the RipStock and ZEROED suite of parts. The EML15 M-LOK handguard reduces weight while retaining attachment points at 3, 6, 9 and top positions for accessories. Pair this rifle with a low-power variable optic such as a Vortex Viper PST 1-6×24 (priced under $1000) for close-to-mid range work and rapid target acquisition.

Applications: range training and small-game/varmint hunting.

Product Specifications

• The platform is Mk4.
• The caliber is 5.7x28mm.
• The operating system is Radial Delayed Blowback.
• The barrel length is 16.1.
• The barrel twist is 1:9.
• The barrel material is 4140CM SBN.
• The muzzle device is a CMMG ZEROED Muzzle Brake.
• The muzzle thread is 1/2 x 28.
• The upper receiver is Billet 6061 T6 Aluminum.
• The lower receiver is Mk4 Forged 7075 T6 Aluminum.
• The hand guard is a CMMG EML15 M-LOK.
• The stock/brace is a CMMG RipStock.
• The magazine included is a CMMG 32rd.
• The listed weight is 6.4 lbs.
• The UPC is 810144723570.

The RESOLUTE Mk4 blends AR-style ergonomics with the unique ballistics of 5.7x28mm, offering a lightweight, modular carbine that’s easy to carry and configure. Its combination of ZEROED controls, ambidextrous features, and a purpose-built handguard make it a versatile platform for shooters who value modularity and modern ergonomics. Whether you plan focused range sessions or field work, this configuration delivers a practical balance of handling and capability.