This diamondback db15 rifle features a 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.Action: Semi-AutoCaliber: 5.56x45mm NATOBarrel Length: 16"Capacity: 30+1Safety: AmbidextrousOal: 33"- 36.25"Weight: 6.60 lbsStock Description: Adjustable Magpul CTRMuzzle: Muzzle BrakeReceiver Material: 7075-T6 AluminumSights: Optic ReadyTwist: 1:8"Barrel Length Range: 16" to 16.99"Weight Range: 6 lbs to 6.99 lbsHand: Right HandStock Finish Group: Brown