CMMG Dissent MK4, Semi-automatic Pistol, 5.7x28, 6.5 Barrel, Cerakote Finish, Midnight Bronze, Zeroed Linear Compensator, 5.5 Free Float M-LOK Handguard, Zeroed Pistol Grip, 1913 Picatinny Rail End Cap, Manual Safety, 32 Rounds, 2 Magazines 54AA847-MB The next evolution of the AR15. Chambered in the iconic 5.56x45mm cartridge, the DISSENT is unlike any other AR15 Personal Defense Weapon, ditching the buffer tube and traditional AR recoil system in favor of their patent-pending Compact Action. In addition to the revolutionary Compact Action that shrinks this AR pistol's footprint significantly, the DISSENT features a forward non-reciprocating side charger that allows you to charge the weapon without coming off target.