The dd5 v4 7.62x51mm nato features a user adjustable gas block for reliable supressed shooting, and a 18" cold hammer forged proprietary steel chrome-lined barrel.The lower receiver has an enhanced flared magazine well and rear receiver qd swivel attachment point, and is the lower receiver is made from cnc machined 7075-t6 aluminum.The buttstock and pistol grip are made of a glass field polymer with soft touch molding, and is daniel defense dd5 rail 15.0 with m-lok attachment.Metal Finish: Black AnodizedAction: Semi-AutoCaliber: 7.62x51mm NATOBarrel Length: 16"Capacity: 20+1Trigger: Mil-SpecSafety: Safety Selector SwitchOal: 33.38"- 37"Weight: 8.30 lbsStock Description: 6 Position with SoftTouch OvermoldingMuzzle: DD Superior Suppression DeviceReceiver Material: 7075-T6 AluminumSights: Optic ReadyBarrel Description: Chrome LinedTwist: 1:11"Barrel Length Range: 16" to 16.99"Weight Range: 8 lbs to 8.99 lbsHand: RightStock Finish Group: BlackMetal Finish Group: Blued/Black