The CMMG Dissent BR4 in .300 AAC Blackout (brand part no. 30A5C0FAB) brings one of the most versatile calibers on the market to a compact, California-compliant configuration. CMMG pairs a 14.5-inch black nitride threaded barrel with a 1:7-inch twist, and a pinned-and-welded ZEROED SVD muzzle brake brings the overall barrel length to 16.1 inches, keeping the rifle NFA-tax-stamp-free. The rifle feeds from two included 10-round Magpul PMags, and a Black Armor Cerakote-finished aluminum receiver pairs with a Magpul SGA black synthetic stock and a Picatinny top rail. Among modern sporting rifles in the AR rifles category, the Dissent BR4 favors California shooters who want a compact .300 Blackout carbine.

Key Specifications

• Chambered in .300 AAC Blackout with a 1:7-inch rate of twist.
• Features a 14.5-inch black nitride threaded barrel.
• A pinned-and-welded ZEROED SVD muzzle brake brings overall length to 16.1 inches.
• Feeds from two 10-round Magpul PMags, included.
• Receiver is Black Armor Cerakote aluminum with a Picatinny top rail.
• Stock is a Magpul SGA black synthetic design.
• The safety is a crossbolt safety.
• Built for California-compliant configuration.
• Finished in black.

Frequently Asked Questions

Why is the muzzle brake pinned and welded? It brings the overall barrel length to 16.1 inches, so no NFA tax stamp is required.

How many magazines are included? Two 10-round Magpul PMags ship with the rifle.

Buy the CMMG Dissent BR4 .300 Blackout Carbine

A compact, California-compliant .300 Blackout carbine is exactly what the Dissent BR4 delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.