CMMG Resolute MK4 300 Blackout 16.1" 30+1 Semi-Auto Rifle

The CMMG Resolute MK4 is a semi-automatic AR-15 platform rifle chambered in 300 Blackout, delivering hard-hitting .30 caliber performance from a 16.1-inch medium-taper threaded barrel. Built around CMMG's Mk4 forged 7075-T6 aluminum lower receiver with a durable Cerakote Armor Black finish, the Resolute MK4 pairs familiar AR ergonomics with modern upgrades for hunting, home defense, and suppressed shooting alike.

The 16.10" medium-taper threaded barrel with a 1:7 twist stabilizes a wide range of .300 BLK supersonic and subsonic loads, while the CMMG Zeroed muzzle brake tames recoil at the muzzle. Up front, the CMMG EML15 M-LOK handguard provides a slim, lightweight platform for accessories, and an ambidextrous CMMG Zeroed charging handle makes manipulations quick from either side of the rifle.

Controls are dialed in with a CMMG Zeroed drop-in single-stage trigger and a CMMG Zeroed 60/90-degree safety. The CMMG 6-position RipStock lets shooters dial in length-of-pull for a comfortable fit with body armor or heavy winter gear, and the rifle ships with a 30-round detachable magazine for a 30+1 total capacity. With an overall length of 32.50" and a weight of just 6.20 lbs, the Resolute MK4 is a compact, maneuverable platform ready for the range, the field, or behind a suppressor.

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