The CMMG Dissent BR4 is a semi-automatic Modern Sporting Rifle chambered in .300 AAC Blackout with a 16.1 inch barrel. The platform pairs a full-length Picatinny top rail and proprietary M-LOK handguard with a Magpul SGA synthetic stock for practical field and range use. Two Magpul 10-round PMAGs are included for compliant-capacity operation.
Key Specifications
- Chambered in .300 AAC Blackout for compatibility with subsonic and supersonic loadings.
- The barrel measures 16.1 inches to meet compact carbine handling characteristics.
- The action type is Semi-Automatic as a modern sporting rifle platform.
- The barrel twist rate is 1:7, suitable for common .300 BLK projectiles.
- The barrel material is specified as 4140CM SBN.
- The muzzle device is the CMMG Zeroed Muzzle Brake.
- The gas system is a carbine-length arrangement with an adjustable 0.750″ gas block.
- The upper receiver is DISSENT 7075 T6 Aluminum.
- The lower receiver is a BR4 billet 7075 T6 Aluminum.
- The stock is a Magpul SGA synthetic Remington 870-style configuration.
The Dissent BR4 balances familiar AR ergonomics with .300 Blackout versatility for hunting, suppressed shooting, and range use. Built around durable 7075 T6 receivers and a proprietary handguard, it offers a workmanlike platform for shooters who prioritize reliable components and practical features.
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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