Diamondback firearms db15 rifle made entirely in the usa.It uses a gas-impingement system and high quality cnc machined components.The db15300 model features a melonite coated, 4140 chrome-moly, free-float barrel, 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, magpul ctr buttstock and mil-spec buffer tube, magpul moe pistol grip, diamondback 12" keymod handguard, and a black hardcoat anodized finish.Action: Semi-AutoCaliber: 300 BlackoutBarrel Length: 16"Capacity: 30+1Safety: ManualOal: 32.25"-35.50"Weight: 6.62 lbsStock Description: Adjustable Magpul MOE CarbineMuzzle: A2 Flash HiderReceiver Material: 7075-T6 AluminumSights: None, Optic ReadyBarrel Description: 4150 Chrome MolyTwist: 1:9"Barrel Length Range: 16" to 16.99"Weight Range: 6 lbs to 6.99 lbsHand: RightStock Finish Group: BlackMetal Finish Group: Blued/Black