The CMMG Resolute Mk3 in 8.6 Blackout (brand part no. 33A590C-MB) is a semi-auto rifle built on CMMG’s Mk3 platform, a DPMS-pattern .308/AR10-derived receiver, finished in a distinct Midnight Bronze color. CMMG pairs a 16.1-inch barrel with the same RIPSTOCK adjustable buttstock and EML 15 M-LOK handguard found across the Resolute Mk3 line. Among big-bore AR platforms in the AR rifles category, this Resolute favors hunters who want strong suppressed performance from a shorter barrel with a distinct field finish.

Key Specifications

• Chambered in 8.6 Blackout, built for full ballistic potential from a short barrel.
• Barrel has a fast 1:3-inch rate of twist, tuned for 8.6 Blackout’s heavy bullets.
• Built on CMMG’s Mk3 platform, a DPMS-pattern .308/AR10-derived receiver.
• Features a 16.1-inch barrel.
• Includes the CMMG RIPSTOCK adjustable buttstock.
• Wrapped in the EML 15 M-LOK handguard.
• Ships optics-ready with no fixed sights.
• Feeds from a detachable magazine with a 20-round capacity.
• Finished in Midnight Bronze.

Frequently Asked Questions

Why is 8.6 Blackout suited to a shorter barrel? Its fast twist rate and cartridge design reach full ballistic potential from a much shorter barrel than typical AR10-class cartridges.

What platform is this rifle built on? CMMG’s Mk3, a DPMS-pattern .308/AR10-derived receiver.

Buy the CMMG Resolute Mk3 8.6 Blackout

A short-barrel big-bore AR with a distinct Midnight Bronze finish is exactly what the Resolute Mk3 delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.