Diamondback firearms' db15 rifle is made entirely in the usa.It uses a gas-impingement system and high quality cnc machined components.The db15cc rifle features a melonite coated, 4140 chrome-moly, free-float barrel.It also has a forged 7075 t6 aluminum lower along with an a3 flattop upper receiver, no sights, and a carbine length gas system.This model has an a2 flash hider, 6-position ati mil-spec buttstock and buffer tube, a2 pistol grip, and a 10" free-float handguard quad rail.Action: Semi-AutoCaliber: 5.56x45mm NATOBarrel Length: 16"Capacity: 30+1Safety: ManualOal: 32.75"-36"Weight: 6.40 lbsStock Description: 6 PositionMuzzle: A2 Flash HiderReceiver Material: 7075-T6 AluminumSights: None, Optic ReadyBarrel Description: 4150 Chrome MolyTwist: 1:8"Barrel Length Range: 16" to 16.99"Weight Range: 6 lbs to 6.99 lbsHand: RightStock Finish Group: BlackMetal Finish Group: Blued/Black