The CMMG DISSENT is an AR Personal Defense Weapon like no other. Incorporating a variety of new features and technologies each DISSENT is made to maximize portability and modularity most notably thanks to CMMG’s patent-pending Compact Action that houses the entire recoil system in the upper receiver eliminating the need for the buffer tube altogether. – Chambered in 300 BLK this DISSENT packs .30 cal power in an ultra-compact package that offers AR15 ambi controls and our forward non-reciprocating side charger that can be switched for left or right-handed operation. At the rear of the lower receiver is a 1913 picatinny rail section for attaching the brace or stock that fits you best. – Platform: Mk4 – Caliber: .300 BLK – Operating System: Compact Action-Direct Impingement – Barrel Length: 6.5 – Barrel Twist: 1:7 – Barrel Contour: MT – Barrel Material: 4140CM SBN – Barrel Twist: 1:7 – Muzzle Device: CMMG ZEROED Linear Compensator – Muzzle Thread: 5/8 x 24 – Gas Port Location: Pistol – Gas Block: SLR Adjustable .750 – Upper Receiver: DISSENT 7075 T6 Aluminum – Lower Receiver: Mk4 Forged 7075 T6 Aluminum – Hand Guard: CMMG 5.5 Proprietary – Finish: Cerakote – Charging Handle: DISSENT Side Charger Left – Pistol Grip: CMMG ZEROED Pistol Grip – Receiver Extension: 1913 Picatinny Rail End Cap – Trigger Type: TriggerTech AR-D 2-Stage – Trigger Guard: CMMG ZEROED Trigger Guard – Safety Selector: CMMG ZEROED 60/90 Degree – Magazine: Magpul 300BLK 30rd PMAG – Weight: 4.8 lbs – Length: 14.7