Windham weaponry's src in 300 blackout comes equipped with a 6-position buttstock, double heat shield handguard, and one 30 round magazine.This semi-automatic rifle is powered by a gas impingement system.Metal Finish: Black Hardcoat Anodized/Black PhosphateAction: Semi-AutoCaliber: 300 BlackoutBarrel Length: 16"Capacity: 30+1Trigger: StandardSafety: LeverOal: 32.38"-36.13"Weight: 6.15 lbsStock Description: 6 PositionMuzzle: Diamondhead T BrakeReceiver Material: 7075 T6 AluminumSights: None, Optic ReadyBarrel Description: 4150 Chrome Moly Vanadium Chrome-Lined HeavyTwist: 1:7"Barrel Length Range: 16" to 16.99"Weight Range: 6 lbs to 6.99 lbsHand: RightStock Finish Group: BlackMetal Finish Group: Blued/Black