CMMG DISSENT BR4, Semi-automatic, Rifle, 556NATO, 16.1 Barrel, 1/2x28 Threaded, ZEROED Muzzle Break, Cerakote Finish, Armor Black, 15 M-LOK Handguard, Reversible Dissent Side Charger, Magpul SGA Remington 870 Stock, ZEROED Drop-In Single Stage Trigger, Reversible Cross Bolt Safety, 10 Rounds, 2 Magazines 55A520B-AB There's a world of options when it comes to firearms and calibers, and for those who want to reach out to further targets or hunt with 5.56, the 16-inch Br4 chambered in 5.56x45mm is an awesome choice. Despite all the different caliber offerings in the DISSENT lineup, 5.56x45mm still stands as one of the most popular. Equipped with a 16.1" barrel, this Br4 is one classy carbine.