The CMMG Dissent BR3 is an AR10-sized utility rifle chambered in .308 WIN with a 16.1 in barrel and an Armor Black Cerakote finish. It combines Mk3-compatible upper/lower ergonomics with features intended for use in jurisdictions with additional rifle restrictions. The platform includes a full-length Picatinny top rail and a 15 in M-LOK handguard for mounting optics and accessories.
Key Specifications
- The caliber is .308 WIN.
- The barrel measures 16.1 inches and has a 1:10 twist rate.
- The operating system is Compact Action – Direct Impingement.
- The barrel is made from 4140CM with a Nitride finish.
- The muzzle device is a CMMG ZEROED Muzzle Brake with 5/8×24 threads.
- The gas block is an adjustable 0.750 inch unit for tuning or suppressed use.
- The upper receiver is DISSENT Mk3 7075 T6 Aluminum and the lower is a Br3 Billet 7075 T6 Aluminum.
- The handguard is a CMMG 15-inch proprietary design with M-LOK slots.
- Standard magazines are two Magpul 10rd PMAGs.
- The rifle’s listed weight is approximately 8.9 lbs with an overall length of 39.6 inches.
Designed for practical versatility, the Dissent BR3 offers a blend of traditional controls and modern features for users who need a compliant, configurable large-frame rifle. The reversible side charger, integrated trigger guard and Remington 870-compatible Magpul SGA stock pattern make this platform straightforward to set up for a range of real-world roles from precision-oriented shooting to general utility in regulated environments.
Product information is supplied by the manufacturer and/or distributor and may be automatically formatted or enhanced using AI for clarity and consistency. While we strive for accuracy, specifications, features, and included items may change without notice. Always verify details using the manufacturer’s official documentation and the information shown on this product page before purchase or use.
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