The CMMG Dissent Br4 6.5 Grendel rifle in Armor Black (CMMG part no. 64A190CAB) is a flat-shooting carbine for medium to long-range hunting and target work. CMMG describes 6.5 Grendel as a modern favorite thanks to its flat trajectory and efficient 6.5mm projectiles. The Br4 platform adds a Magpul SGA stock in the Remington 870 pattern, reversible controls, an M-LOK handguard and an adjustable gas block for tuning. The 5/8×24 muzzle thread and ZEROED SVB brake make it easy to add a suppressor or another device later.

Key Specifications

• The chambering is 6.5 Grendel, a cartridge known for flat trajectories and efficient 6.5mm bullets.
• The barrel is 16.1 inches with a 4140CM nitride profile, offering carbine handling with enough length for the cartridge.
• Rifling is a 1:7 twist, quick enough to stabilize the heavier 6.5mm bullets.
• The muzzle carries a ZEROED SVB brake on a 5/8×24 thread, which allows other 5/8×24 muzzle devices or a suppressor.
• The gas block is adjustable at 0.750 inch, so you can dial in cycling for different loads.
• The stock is a Magpul SGA in the Remington 870 pattern, which keeps traditional ergonomics.
• The safety is a reversible cross-bolt, placed where a traditional rifle shooter expects it.
• The charging handle is a forward Dissent side charger that stays still while the rifle cycles.
• The trigger is a ZEROED drop-in single-stage unit, a cassette design that installs without fitting.
• Two 10-round CMMG magazines come with the rifle for a 10-round capacity.

Frequently Asked Questions

What is 6.5 Grendel best used for? CMMG describes it as designed for medium to long-range shooting, and the Br4 is aimed at hunters and target shooters who want that flat trajectory in a carbine.

Does the rifle have a stock I can swap? It ships with a Magpul SGA stock, and the Br4 is compatible with Remington 870-pattern stocks.

Is the muzzle threaded? Yes. The ZEROED SVB brake sits on a 5/8×24 thread, which accepts other muzzle devices of that pattern.

Buy the CMMG Dissent Br4 Rifle, 6.5 Grendel, 16.1-Inch, Armor Black, Muzzle Brake, Magpul SGA Stock, 10-Round

Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL. For more rifles in the same family, see our AR rifles. The Br4 6.5 Grendel is built for shooters who want a modern carbine with a traditional stock.