This 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 moe-k2 grip, and a magpul ctr stock.This model has a diamondback black gold lower receiver.Action: Semi-AutoCaliber: 5.56x45mm NATOBarrel Length: 16"Capacity: 30+1Safety: ManualOal: 32.75"-36"Weight: 6.95 lbsStock Description: Adjustable Magpul CTRMuzzle: Flash HiderReceiver Material: 7075-T6 AluminumSights: Magpul MBUS Front & RearBarrel Description: 4140 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