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CMMG
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.
| Caliber | 5.56x45mm |
| Barrel Length | 16.1 inches |
| Barrel Twist | 1:7 |
| Barrel Material | 4140CM steel |
| Barrel Contour | MT |
| Gas System | Direct impingement, mid-length, adjustable gas block (0.750) |
| Platform | CMMG Dissent BR4 |
| Upper Receiver | 7075 T6 aluminum |
| Lower Receiver | BR4 billet 7075 T6 aluminum |
| Handguard | CMMG proprietary, 15 inches |
| Trigger | CMMG ZEROED single-stage drop-in |
| Safety Selector | Reversible cross-bolt |
| Charging Handle | CMMG Dissent side charger (reversible) |
| Stock/Brace | Magpul SGA (Remington 870 configuration) |
| Muzzle Device | CMMG ZEROED muzzle brake |
| Muzzle Thread | 1/2 x 28 |
| Finish | Cerakote |
| Weight | 8 lbs |
| Length | 38.1 inches |
| Magazines Included | (2) Magpul 10-round PMag |
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.
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.
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.
The rifle ships with two Magpul 10-round magazines. No additional components are included.
CMMG
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.
| Caliber | 5.56x45mm |
| Barrel Length | 16.1 inches |
| Barrel Twist | 1:7 |
| Barrel Material | 4140CM steel |
| Barrel Contour | MT |
| Gas System | Direct impingement, mid-length, adjustable gas block (0.750) |
| Platform | CMMG Dissent BR4 |
| Upper Receiver | 7075 T6 aluminum |
| Lower Receiver | BR4 billet 7075 T6 aluminum |
| Handguard | CMMG proprietary, 15 inches |
| Trigger | CMMG ZEROED single-stage drop-in |
| Safety Selector | Reversible cross-bolt |
| Charging Handle | CMMG Dissent side charger (reversible) |
| Stock/Brace | Magpul SGA (Remington 870 configuration) |
| Muzzle Device | CMMG ZEROED muzzle brake |
| Muzzle Thread | 1/2 x 28 |
| Finish | Cerakote |
| Weight | 8 lbs |
| Length | 38.1 inches |
| Magazines Included | (2) Magpul 10-round PMag |
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.
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.
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.
The rifle ships with two Magpul 10-round magazines. No additional components are included.
