Cmmg Dissent 55A520B-Ab Br4 556 16.1 *Ca Armbk

The CMMG Dissent BR4 in 5.56x45mm is a modern, versatile carbine built for shooters who want a reliable platform that handles everything from the range to hunting. With its 16.1-inch barrel and compact direct-impingement system, this rifle strikes a practical balance between maneuverability and velocity in one of the most widely available rifle cartridges. The BR4 lower and upper receivers are machined from 7075 T6 aluminum and finished in Cerakote, giving you a tough, lightweight gun that won't quit.

What sets the Dissent apart is its thoughtful feature set. The adjustable mid-mounted gas block lets you tune the action to your ammo and suppressor setup. CMMG's proprietary 15-inch handguard gives you plenty of rail real estate for optics, lights, or other accessories without excess weight. The side-charging handle is reversible, so lefties and righties both get a shooter-friendly controls layout. You're also getting a CMMG ZEROED single-stage drop-in trigger—a proven performer that makes training and hunting more precise.

This is a rifle that works out of the box. The Magpul SGA stock (configured for a Remington 870-pattern brace on this California-compliant version) and integrated trigger guard keep things simple and functional. At 8 pounds and 38.1 inches long, the BR4 is handy enough for tight hunting situations or tactical drills, yet stiff enough to stay on target downrange. It ships with two Magpul 10-round magazines.

If you're looking for a no-nonsense 5.56 that you can actually shoot—not just admire—the CMMG Dissent BR4 earns its place on the rack.

Key Features

• 16.1-inch 4140CM barrel with 1:7 twist rate optimized for modern ammunition
• Compact direct-impingement action with adjustable mid-mount gas block for tuning and suppressor compatibility
• Reversible side-charging handle accommodates left and right-handed shooters
• CMMG ZEROED single-stage drop-in trigger for reliable, predictable breaks
• CMMG proprietary 15-inch handguard with integrated accessory rail
• 7075 T6 aluminum receivers with Cerakote finish for durability and corrosion resistance
• Magpul SGA stock and integrated trigger guard
• CMMG ZEROED muzzle brake with 1/2 x 28 thread pitch
• Includes two Magpul 10-round magazines

Specifications

Frequently Asked Questions

What makes the Dissent BR4 different from a standard direct-impingement carbine?

The BR4 combines a compact action platform with thoughtful details: a reversible side-charging handle, adjustable gas block for tuning, a quality ZEROED single-stage trigger, and proprietary handguard geometry. It's designed for shooters who want their gun to work the way they shoot, not the other way around.

Can I use a suppressor on this rifle?

Yes. The adjustable mid-mount gas block lets you dial in the action for suppressed fire, and the muzzle device has a standard 1/2 x 28 thread pitch, which is the most common mounting pattern for 5.56 suppressors.

Is this rifle left-hand friendly?

The charging handle is reversible, and the safety selector is reversible as well, making it accessible to left-handed shooters. The side-charger design itself benefits both orientations.

What's in the box?

The rifle ships with two Magpul 10-round magazines. No additional components are included.