CMMG Dissent MK4 6mm ARC 16.1" - AR-15 Rifle - 2x 10rd Mag

The CMMG Dissent MK4 is a semi-auto rifle chambered in 6mm ARC, built on an AR-10 style platform with a 16.1" barrel, side-folding stock, 15" M-LOK handguard, and full ambidextrous controls—combining the Hornady cartridge's long-range ballistic efficiency with the Dissent's folding-stock versatility and precision Zeroed trigger.

The 16.1" 4140 steel barrel with 1:7.5" twist is optimized for 6mm ARC's bullet weight range, delivering the long-range performance and wind resistance the cartridge is designed for. The CMMG Zeroed Muzzle Brake reduces muzzle rise for fast follow-up shots at distance, and the Zeroed Drop-In Single Stage trigger provides a clean, consistent break. The ambidextrous CMMG Zeroed 60/90-degree safety selector and full ambi controls extend complete operation to both right- and left-handed shooters.

The Dissent side-folding stock folds to 25.90" OAL for compact storage, deploying to 36.60" for shooting. The 15" M-LOK handguard provides extensive mounting surface. Ships with two 10-round magazines. Thread pattern is 5/8"x24—note when selecting muzzle devices, as this differs from the standard AR-15 1/2"x28 pattern.

Both the aluminum receiver and 4140 steel barrel are finished in Black Armor Cerakote. CMMG Zeroed pistol grip and the Dissent folding stock complete the all-black build at 7.70 lbs.

A strong choice for precision-oriented shooters who want a folding-stock, ambidextrous 6mm ARC platform capable of reaching distance without the added weight of traditional AR-10 platforms in larger calibers.

CMMG chambers the Dissent MK4 in 6mm ARC as part of their commitment to supporting emerging precision cartridges on proven platforms, with the 1:7.5" twist rate matched to the cartridge's optimal bullet weight range from the factory.