The CMMG Dissent Br4 in 6mm ARC (brand part no. 60AB40CAB) is a semi-automatic rifle built on CMMG’s compact Br4 platform, pairing a 16.1-inch, 4140CM SBN barrel with a 1:7.5-inch twist tuned for the flat-shooting 6mm ARC cartridge. CMMG runs a direct-impingement gas system through an adjustable 0.750 gas block, tops the muzzle with a CMMG ZEROED muzzle brake threaded 5/8×24, and wraps the barrel in a proprietary CMMG 15 M-LOK handguard. The rifle is finished in Cerakote and features CMMG’s reversible side-charging handle, a Magpul SGA stock built on the Remington 870 pattern, a ZEROED drop-in single-stage trigger, and a reversible cross-bolt safety selector. It ships with two 10-round CMMG magazines and weighs about 8 pounds. Among AR-platform rifles in the AR rifles category, the Dissent Br4 favors hunters and long-range shooters who want the extended reach of 6mm ARC in a compact, low-recoil build.

Key Specifications

• Chambered in 6mm ARC with a 1:7.5-inch rate of twist.
• Operates on a direct-impingement gas system with an adjustable 0.750 gas block.
• Features a 16.1-inch, 4140CM SBN steel barrel.
• Finished with a CMMG ZEROED muzzle brake, threaded 5/8×24.
• Wrapped in a CMMG 15 proprietary M-LOK handguard.
• Includes a reversible side-charging handle.
• Fitted with a Magpul SGA stock on the Remington 870 pattern.
• Runs a ZEROED drop-in single-stage trigger and a reversible cross-bolt safety.
• Ships with two 10-round CMMG magazines.
• Weighs approximately 8 pounds.

Frequently Asked Questions

What stock does this rifle use? A Magpul SGA stock built on the Remington 870 pattern.

How many magazines are included? Two 10-round CMMG magazines ship with the rifle.

Is the charging handle reversible? Yes, CMMG’s side-charging handle is reversible for left- or right-handed use.

Buy the CMMG Dissent Br4 6mm ARC

A compact, low-recoil 6mm ARC rifle with a classic-styled stock is exactly what the Dissent Br4 delivers. As soon as it’s ready to ship, order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.