The CMMG Dissent BR4 Rifle (CMMG part no. 94AC80FCT) brings classic rifle ergonomics to a 9mm pistol-caliber carbine, using CMMG’s fixed-ejector Radial Delayed Blowback technology from the 9mm Dissent lineup. It’s configured to meet California compliance requirements, built around a 16.1-inch black nitride threaded barrel with a 1:10 twist and finished in Coyote Tan Cerakote over the receiver. It uses CMMG’s 9mm conversion magazines, and because the Br4 lower accepts other STANAG-pattern magazines, it can also run other Mk4 DISSENT upper groups if you decide to swap calibers down the road. A Magpul SGA black polymer stock and a crossbolt safety round out a rifle built for shooters who want rifle-like handling in a compliant 9mm package.

Key Specifications

• Chambered in 9mm Luger for a pistol-caliber carbine with rifle ergonomics.
• Rifling twist rate of 1:10 for the 9mm chambering.
• Ships with a 10-round magazine, configured to meet California compliance requirements.
• 16.1-inch threaded barrel is finished in black nitride.
• Uses a crossbolt safety for a distinct manual of arms.
• Runs CMMG’s fixed-ejector Radial Delayed Blowback operating system.
• Magpul SGA black polymer stock brings classic rifle ergonomics to the platform.
• Finished in Coyote Tan Cerakote over the receiver.
• Lower accepts STANAG-pattern magazines, compatible with other Mk4 DISSENT upper groups.

Frequently Asked Questions

Is this configuration compliant for California? Yes, this build is configured to meet California compliance requirements while retaining a 10-round magazine.

What operating system does it use? CMMG’s fixed-ejector Radial Delayed Blowback technology from its 9mm Dissent lineup.

Can I use other CMMG upper groups on this lower? Yes, the Br4 lower accepts STANAG-pattern magazines and works with other Mk4 DISSENT upper groups.

Buy the CMMG Dissent BR4 Rifle

Want rifle ergonomics in a compliant 9mm carbine? Order this CMMG rifle from our AR rifles lineup and we’ll ship it fast and insured to your local FFL from our Lubbock, Texas shop.