.300 AAC Blackout caliber; Compact Action-Direct impingement operating system; 4140CM, SBN barrel material; Cmmg zeroed linear compensator muzzle device; Adjustable Gas Block - With the SLR 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; TriggerTech AR-D 2-Stage Trigger - With a 4 lb pull weight, the AR-D trigger showcases a light, repeatable break; Cmmg's 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; Cerakote finish; Lifetime Quality Guarantee