CMMG Resolute Mk4 5.7×28 | 16.1″ | Armor Black

The CMMG RESOLUTE’Mk4 in 5.7 x 28 mm is a carbine-length modern sporting rifle built on CMMG’s Mk4 platform with ambidextrous controls and a CMMG RipStock. Its 16.1-inch barrel and EML15 M-LOK handguard keep weight and bulk moderate while retaining accessory mounting options. For a mounting option under $1,000 that pairs well with this chassis consider a Vortex Viper PST Gen II 1-6×24 or a similar 1-6x optic for close-to-mid-range precision on a carbine platform.

This platform is well suited to precision-oriented range work and practical competition where a high-velocity, low-recoil 5.7 cartridge and a carbine-length barrel provide flat trajectories and quick follow-up shots. The rifle’s configuration also supports modular accessory changes for match or range setups.

Product Specifications

• The caliber is 5.7 x 28 mm.
• The barrel measures 16.1 inches.
• The barrel twist rate is 1:9.
• The action is Semi-Auto.
• The overall length is 32.5 inches.
• The weight is 6.44 pounds.
• The finish is Cerakote Armor Black.
• The handguard is a CMMG EML15 M-LOK.
• The upper receiver is billet 6061 T6 aluminum.
• The lower receiver is Mk4 forged 7075 T6 aluminum.
• The muzzle threads are 1/2 x 28.
• The muzzle device is a CMMG ZEROED muzzle brake.
• The stock is a CMMG RipStock with ambidextrous sling plate.
• The rifle uses a detachable magazine.
• The reported magazine capacity is conflicting across sources (32 vs 40) and requires verification.
• The UPC is 810144723556.

The RESOLUTE Mk4 is a thoughtfully configured carbine for shooters who value modular controls, a lightweight M-LOK fore-end and a calibrated carbine-length barrel. Its parts selection—billet upper, forged lower, ZEROED furniture and ambidextrous controls—keeps the platform ready for tailored optics and accessory setups for dedicated range work or competitive formats. If you want a modern, configurable 5.7×28 carbine built for low weight and practical accuracy, this RESOLUTE Mk4 presents a balanced option.

Related Videos: