Diamondback db15 rifle features a carbine-length, medium 4150 chrome moly barrel, mid-length gas system and a shot-peened mil-spec 8620 bolt carrier.It utilizes 7075-t6 aluminum receivers, 15" m-lok handguard, magpul grip, and a magpul carbine stock.Includes a 30rd gen 3 pmag mct.Action: Semi-AutoCaliber: 5.56x45mm NATOBarrel Length: 16"Capacity: 30+1Trigger: Standard Mil-SpecSafety: Manual ThumbOal: 32.50"- 35.75"Weight: 6.60 lbsStock Description: Adjustable Magpul CarbineMuzzle: A2 Flash HiderReceiver Material: 7075-T6 AluminumSights: Optic ReadyBarrel Description: Chrome MolyTwist: 1:8"Barrel Length Range: 16" to 16.99"Weight Range: 6 lbs to 6.99 lbsHand: RightStock Finish Group: BrownMetal Finish Group: Blued/Black