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. – Platform Br4 – Caliber 5.56x45mm – Operating System Compact Action-Direct Impingement – Barrel Length 16.1 – Barrel Twist 1:7 – Barrel Contour MT – Barrel Material 4140CM SBN – Barrel Twist 1:7 – Muzzle Device CMMG ZEROED Muzzle Brake – Muzzle Thread 1/2 x 28 – Gas Port Location Mid – Gas Block Adjustable 0.750 – Upper Receiver DISSENT 7075 T6 Aluminum – Lower Receiver Br4 Billet 7075 T6 Aluminum – Hand Guard CMMG 15 Proprietary – Finish Cerakote – Charging Handle Dissent Side Charger- Reversible – Stock / Brace Magpul SGA- Remington 870 – Trigger Type ZEROED Drop-In Single Stage – Trigger Guard Integrated – Safety Selector Reversible Cross Bolt – Magazine (2) Magpul 10rd PMAG – Weight 8 lbs – Length 38.1