Many of you love the 6.5 300BLK DISSENT so we decided to take it and crank it up to 11!… or how about 10.5? Giving you improved ballistics and an even more suppressor friendly length this all new length 300BLK upper is just the ticket to finish your 300BLK AR pistol build. – It’s no secret that pistol stabilizing braces have been a target for scrutiny over the years and those that enjoy building their own AR pistols have wondered what will come out of all the uncertainty. DISSENT is our answer. Utilizing our patent pending direct impingement Compact Action DISSENT upper groups house the entire action and recoil assembly in the upper receiver resulting in less bulk and length than traditional AR pistols. The forward non-reciprocating side charger allows for quick bolt operation without coming off target. – DISSENT Upper groups include a 1913 Picatinny rail end plate to use in place of the lower receiver buffer tube. – Adjustable Gas Block – 300 BLK is an incredibly adaptable cartridge with different loadings for specific uses like suppressed. With the adjustable gas block on each 300 BLK DISSENT you can fine tune the gas system to best suit the supersonic or subsonic ammo loadings you like best. – Platform Mk4 – Caliber .300 BLK – Operating System Compact Action-Direct Impingement – Barrel Length 10.5 – 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 Adjustable .750 – Upper Receiver DISSENT 7075 T6 Aluminum – Hand Guard CMMG 9.6 Proprietary – Finish Cerakote – Charging Handle DISSENT Side Charger – Left – Receiver Extension 1913 Picatinny Rail End Cap