CMMG Dissent BR4 — 5.56 NATO, 16.1″ Barrel

The CMMG Dissent BR4 is a purpose-built modern sporting carbine chambered for 223 Rem / 5.56 NATO with a 16.1″ threaded barrel. It combines a reversible side-charging upper, an adjustable gas system and a ZEROED drop-in single-stage trigger for a tunable, user-friendly experience on the range or in field use. The rifle is finished in Cerakote Armor Black on matched 7075 T6 aluminum upper and BR4 billet lower receivers and ships with two Magpul PMAG magazines.

Key Specifications

• The caliber is 223 Rem / 5.56 NATO.
• The barrel measures 16.1 inches and is threaded 1/2 x 28.
• The action is Semi-Automatic (Compact Action – Direct Impingement).
• The muzzle device is a CMMG ZEROED muzzle brake.
• The gas block is adjustable (0.750″ car-length) to support suppressed or unsuppressed use.
• The upper is DISSENT 7075 T6 aluminum.
• The lower is a BR4 billet 7075 T6 aluminum receiver.
• The stock is a Magpul SGA configuration.
• The trigger is a ZEROED drop-in single-stage unit with an integrated trigger guard.
• The finish is Cerakote Armor Black.

With ambidextrous controls, a reversible side charger and a car-length adjustable gas system, the Dissent BR4 is built for adaptable, dependable performance. Its components and ergonomics make it a solid choice for range use, practical field applications and shooters who value modular, tuneable rifles that prioritize straightforward functionality.

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