| Platform | Br4 |
| Caliber | 9mm |
| Operating System | Compact Action-Radial Delayed Blowback |
| Barrel Length | 16.1 |
| Barrel Twist | 1:10 |
| Barrel Contour | MT |
| Barrel Material | 4140CM, Nitride Finish |
| Barrel Twist | 1:10 |
| Muzzle Device | N/A |
| Muzzle Thread | N/A |
| Gas Port Location | N/A |
| Gas Block | N/A |
| Upper Receiver | DISSENT 9mm 7075 T6 Aluminum |
| Lower Receiver | Br4 Billet 7075 T6 Aluminum |
| Hand Guard | CMMG 13.5" Proprietary |
| Finish | Cerakote |
| Charging Handle | Dissent Side Charger - Reversible |
| Stock / Brace | Magpul SGA - Remington 870 |
| Trigger Type | ZEROED Single Stage Br4 Specific |
| Trigger Guard | Integrated |
| Safety Selector | Reversible Cross Bolt |
| Magazine | Magpul 10rd PMAG (2) |
| Weight | 7.6 lbs |
| Length | 36.7" |
AR Parts Notice - State/local restrictions may apply in CT, DC, IL, MA, NJ, NY, or WA. Customers must review our Shipping Policy prior to ordering.
Rifle, DISSENT, Br4, 9mm, 16.1", Non-Threaded
The Br4 was designed for Americans residing in states with restrictions a lot of us can't comprehend or relate to. Enter the Br4 with an all-new EMPIRE profile unthreaded barrel and a recessed barrel crown. As if this new Br4 platform wasn't good enough, CMMG found low hanging fruit for states that don't allow threaded barrels. Like the entire Br4 lineup, this upper group compliments the firearm nicely and a lower group that accepts 9mm AR mags.
The 16.1" firearm ships with (2) 10rd magazines, Remington 870 stock compatible, cross-bolt safety, forward non-reciprocating side charger, a proprietary ZEROED single-stage trigger, and your choice of (7) colors.
The Rifle for Restricted States
Although just shy of being available to all 50 US states, the Br4 gives people in 2A unfriendly states a modern choice in a go-to carbine. Combining traditional controls and ergonomics together with modern engineering, there’s a Br4 for every use case, from hunting, to self-defense, or sporting use.
Radial Delayed Blowback™ Compact Action
9mm ammo loadings can vary greatly, from supersonic to subsonic. With a wide range of bullet weights comes new engineering challenges in a new platform. The 9mm Radial Delayed Blowback Compact Action addresses these challenges by utilizing a fixed ejector in the upper receiver. Added benefits are a lighter BCG with less felt recoil while providing consistent performance with a wide range of ammo.
Lifetime Quality Guarantee
We aim to please, that’s why every CMMG product is backed by our Lifetime Quality Guarantee against material and workmanship defects. Learn More.
~Firearms shipping to states with magazine capacity restrictions will only ship with 10rd magazines in place of standard capacity magazines. CMMG does not address any other state compliancy requirements for further restricted states.