The CMMG Dissent Mk4 in 5.56 NATO (brand part no. 55A520BAB) is a semi-automatic rifle on CMMG’s compact Br4 platform, using a direct-impingement operating system, built around a 16.1-inch, threaded, Black Nitride barrel with a 1:7 twist. CMMG ships the Dissent Mk4 with two 10-round PMAGs and a reverse crossbolt safety. Among semi-automatic rifles in the semi-auto rifles category, the Dissent Mk4 favors shooters who want a compact-platform 5.56 build with a threaded barrel.

Key Specifications

• Chambered in 5.56x45mm NATO.
• Operates as a semi-automatic rifle on the Br4 platform with a direct-impingement system.
• Features a 16.1-inch barrel.
• Rate of twist is 1:7.
• Muzzle is threaded 1/2×28.
• Feeds from a magazine with a 10-round capacity.
• Ships with two 10-round PMAGs included.
• Metal finished in Black Nitride.
• Fitted with a reverse crossbolt safety.
• Overall length is approximately 39.7 inches.

Frequently Asked Questions

What platform is this rifle built on? CMMG’s compact Br4 platform, using a direct-impingement operating system.

How many magazines ship with this rifle? Two 10-round PMAGs.

Is the muzzle threaded? Yes, threaded 1/2×28 for a brake, compensator, or suppressor.

Buy the CMMG Dissent Mk4 5.56 NATO

A compact-platform 5.56 build with a threaded barrel is exactly what the Dissent Mk4 delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.