The CMMG(R) DISSENT(TM) 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(R)'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. Each DISSENT is available in a variety of custom Cerakote finishes to match your style. 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.