CMMG Resolute Mk4 300 BLK 16.1" Rifle - Coyote Tan Finish

The CMMG Resolute Mk4 300 BLK 16.1" rifle in Coyote Tan is built for shooters who want a compact, versatile platform that doesn't sacrifice ballistic performance or modularity. Chambered in .300 Blackout and built on the proven Mk4 AR15 platform, the Resolute bridges the gap between the handling ease of a short rifle and the capabilities you'd expect from something with real range. Whether you're running subsonic rounds through a suppressor for quiet operation or pushing supersonic ammunition for extended reach, this 6.2-pound carbine adapts to your mission without complaint.

The 16.1" barrel with a 1:7 twist rate and direct impingement operating system delivers reliable .300 BLK performance in a package that won't wear you out in the field or around the property. CMMG's ZEROED component suite—from the ambi charging handle and safety to the drop-in trigger and muzzle brake—means you get a cohesive, tuned rifle out of the box. The handguard is no afterthought either: the EML15 M-LOK design keeps weight down while providing mounting points at all the key positions (3, 6, 9, and 12 o'clock) so you can build out your setup exactly as needed. Billet upper receiver, forged aluminum lower, and that durable Coyote Tan Cerakote finish mean this rifle is ready for work.

The RipStock buttstock and 6-position receiver extension let you dial in your fit, and the 30-round Magpul PMAG tops off a solid all-around package. At 32.5" overall length, it's maneuverable in tight spaces without the concessions that usually come with true short-barrel rifles. If you're looking for a .300 BLK carbine that's as comfortable on the range as it is in a truck or on a hunting trip, the Resolute Mk4 doesn't need to prove itself—it just works.

Key Features

• Mk4 AR15 platform with direct impingement for familiar maintenance and parts compatibility
• 16.1" 4140CM SBN barrel with 1:7 twist, carbine-length gas system for reliable .300 BLK performance
• CMMG ZEROED component suite: ambi charging handle, ambi safety, drop-in trigger, muzzle brake, and trigger guard
• EML15 M-LOK handguard with mounting points at 3, 6, 9, and 12 o'clock for minimal weight and maximum modularity
• Billet 6061-T6 upper receiver and forged 7075-T6 lower receiver for strength and durability
• RipStock buttstock with 6-position receiver extension for customizable fit
• Coyote Tan Cerakote finish for a durable, rugged look
• Ships with one 30-round Magpul PMAG

Specifications

Frequently Asked Questions

What ammunition does the CMMG Resolute Mk4 shoot?

This rifle is chambered in .300 BLK (300 Blackout). It handles both subsonic and supersonic .300 Blackout loadings, making it versatile for suppressed shooting, hunting, and range work.

Can I use standard AR15 parts and magazines with this rifle?

Yes. The Resolute Mk4 is built on the AR15 platform and uses Magpul PMAG magazines (a 30-rounder is included). Many AR-platform accessories and components are compatible, though always verify fit and function with specific parts.

What's included with the rifle?

The rifle ships with one 30-round Magpul PMAG magazine. It features CMMG's ZEROED suite of components throughout, including the muzzle brake, charging handle, trigger, safety, and other controls.

Is this rifle threaded for a suppressor?

Yes. The barrel is threaded with a 5/8 x 24 muzzle thread, which is the standard for .300 BLK suppressors. The rifle comes with a CMMG ZEROED muzzle brake installed, which can be replaced with a suppressor adapter or suppressor as needed.