The revolution di (direct impingement) features the same technology, durability, features, and ar-15 size, but in a smaller direct impingement system featuring a 9-position adjustable dictator gas block and renegade rail.The dictator adjustable gas block lets you tune your rifle to the exact operating speed it should be.Its adjustable settings and included a straight gas tube, you and your rifle are set for just about any situation.Its patented e2 dual-extraction technology consists of four small channels cut into the walls of the chamber allowing a small amount of gas pressure to push against the neck of the spent case.The match-grade chrome-moly barrel is 5r button rifled with polygonal rifling for extreme accuracy and finish with a nitride for unsurpassed strength, heat and corrosion resilience.The revolution di rifle also utilizes a non-adjustable single-stage and a mil-spec aluminum anti-tilt buffer tube which features "carrier cradle" extensions to ensure that the carrier is always supported by the buffer tube and has three drain holes.Metal Finish: Black Hardcoat AnodizedAction: Semi-AutoCaliber: 308 WinBarrel Length: 16.50"Capacity: 20+1Trigger: Single-StageSafety: ManualOal: 34"Weight: 6.81 lbsStock Description: 6 Position MFT BMS MinimalistMuzzle: Muzzle BrakeReceiver Material: AluminumSights: None, Optic ReadyBarrel Description: Chrome MolyTwist: 1:10"Barrel Length Range: 16" to 16.99"Weight Range: 6 lbs to 6.99 lbsHand: RightStock Finish Group: BlackMetal Finish Group: Blued/Black