The CMMG Dissent BR4 9mm AR platform carbine is engineered for consistent utility across competitive shooting, advanced training, and personal defense applications. This rifle integrates considered design with practical features, optimized for the discerning user.
Key Features
Receiver & Construction
- Material Specification: The receiver is precision machined from 7075-T6 aluminum, providing a robust and stable foundation for the operating system.
- Surface Treatment: A Black Nitride finish is applied to enhance surface hardness, improve wear resistance, and mitigate corrosion, ensuring an extended service life under demanding conditions.
Barrel & Ballistics
- Barrel Length: Features a 16.1-inch barrel, complying with specific regulatory requirements while facilitating stable projectile flight characteristics.
- Muzzle Design: The unthreaded barrel incorporates a recessed crown, a design choice that aids in consistent projectile exit and supports sustained accuracy.
Operating System & Trigger
- Action Type: Utilizes a non-reciprocating forward side charger, which streamlines direct action manipulation and maintains user focus on the target.
- Trigger Group: Equipped with a CMMG Zeroed single-stage trigger, engineered to deliver a predictable, clean pull, which is instrumental in facilitating precise shot placement—a critical attribute for carbine performance.
Practical Integration
Stock Customization
- Stock Interface: Fitted with a Magpul SGA stock, the Dissent BR4 is designed for compatibility with Remington 870 stock models. This provides extensive options for end-user customization and ergonomic optimization through various aftermarket firearm accessories.
Accessory Mounting
- Handguard System: The 13.5-inch proprietary handguard offers substantial mounting real estate. This allows for seamless integration of tactical optics, illumination devices, and other essential shooting range equipment, thereby expanding the rifle’s application versatility.
Technical Specifications
- Caliber: 9mm
- Receiver Material: 7075-T6 Aluminum
- Receiver Finish: Black Nitride
- Barrel Length: 16.1 inches
- Barrel Threading: Unthreaded
- Muzzle Crown: Recessed
- Operating System: Non-reciprocating Forward Side Charge
- Trigger: CMMG Zeroed Single-Stage
- Stock: Magpul SGA (Remington 870 Compatible)
- Handguard Length: 13.5 inches
- Magazine Capacity: 10 Rounds (Two Magpul PMags included)
The CMMG Dissent BR4 9mm carbine is a practical, high-utility choice for training and sport shooting. Consistent maintenance using appropriate gun cleaning supplies ensures its long-term reliable function.









