The CMMG Dissent Br4 .300 Blackout rifle in Armor Black pairs a 16.1-inch barrel with a traditional Magpul SGA stock (CMMG part no. 30A650AAB). With subsonic and supersonic loadings available, .300 Blackout is among the most adaptable cartridges for self-defense, hunting and target shooting. The adjustable gas block lets you dial in the system for suppressed or unsuppressed use. A full-length top Picatinny rail and an M-LOK handguard provide room for optics and accessories.

Key Specifications

• The chambering is .300 Blackout, which handles both supersonic and subsonic loads.
• The barrel is 16.1 inches long.
• Barrel twist is 1:7, suited to the cartridge.
• The muzzle carries a ZEROED SVB brake on 5/8×24 threads.
• Capacity is 10 rounds, and the rifle comes with two Magpul 10-round PMAG magazines.
• The stock is a Magpul SGA compatible with Remington 870 stocks.
• The safety is a reversible cross-bolt selector.
• The gas block is an adjustable 0.750-inch design for tuning with suppressed loads.
• The handguard is a 15-inch CMMG proprietary M-LOK with a top Picatinny rail.
• The rifle weighs 7.8 pounds.

Frequently Asked Questions

Can I use subsonic ammunition? Yes. The .300 Blackout accepts subsonic and supersonic loads, and the adjustable gas block lets you tune the system for either.

Is the muzzle threaded? Yes. The muzzle is threaded 5/8×24 with a ZEROED SVB brake installed.

How many rounds does it hold? It holds 10 rounds, and the rifle comes with two Magpul 10-round PMAG magazines.

Buy the CMMG Dissent Br4 .300 Blackout Rifle, Armor Black

A .300 Blackout Br4 is a versatile carbine you can run suppressed or open. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and browse more AR rifles.