The CMMG Dissent Br4 5.56x45mm rifle in Armor Black is the non-threaded version, with a 16.1-inch Empire profile barrel and a recessed crown (brand part no. 55A830BAB). CMMG designed it for states that do not allow threaded barrels. It pairs that barrel with a lower that accepts 5.56 AR magazines, a Magpul SGA stock for the Remington 870 pattern and a cross-bolt safety. A forward non-reciprocating side charger and a ZEROED single-stage trigger complete the controls. It ships with two 10-round Magpul PMAGs.

Key Specifications

• The chambering is 5.56x45mm, one of the most popular rifle cartridges.
• Barrel length is 16.1 inches with a 1:7 twist.
• The barrel is a non-threaded Empire profile with a recessed crown and no muzzle device.
• The barrel is 4140CM steel with a nitride finish.
• The gas system uses an adjustable 0.750-inch gas block.
• The stock is a Magpul SGA for the Remington 870 pattern.
• The safety is a reversible crossbolt selector.
• The trigger is a ZEROED single-stage unit made for the Br4, with an integrated trigger guard.
• The handguard is a 13.5-inch proprietary CMMG M-LOK design, and the finish is Armor Black Cerakote.
• It includes two 10-round Magpul PMAG magazines and weighs 7.7 pounds at 36.7 inches overall.

Frequently Asked Questions

Is the barrel threaded? No. This version has an unthreaded Empire profile barrel with a recessed crown.

What magazines does it use? The lower accepts 5.56 AR magazines, and the rifle ships with two 10-round Magpul PMAGs.

What stock does it have? It uses a Magpul SGA stock designed to be compatible with Remington 870 stocks.

Buy the CMMG Dissent Br4 Rifle, 5.56x45mm, 16.1-Inch, Non-Threaded Empire Barrel, Armor Black, 10-Round

The non-threaded Br4 gives you a straightforward 5.56 rifle without a muzzle device. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and browse more AR rifles.