Barrel: 18" cmv, 1x10 twist.Standard gas system.Threaded muzzle 5/8-24, a2 flash hider.Heavy profile, m4 feed ramps.Bolt and carrier: phosphated 8620 steel carrier assembly.9310 bolt.Heat treated and plated.Mil-spec.Chrome lined carrier interior.Carrier key - chrome lined, attached with grade 8 screws.Properly staked & sealed gas key.Handguards: magpul m-lok rifle length handguard.Upper receiver: forged 7075 t6 aluminum.M4 feeds ramps with t-marks.Hard coat anodized.Ejection port cover and round forward assist.Right hand ejection.Lower receiver: forged 7075 t6 aluminum.Hard coat anodized.Integrated triggerguard.Semi-auto.Aluminum mag catch button.Ergo sure grip - ambi - black.Buttstock: magpul moe (collapsible) 308 carbine buffer tube.H-buffer.Included: 1 x 20rd.308 magpul pmag.Chamber flag.Gun lockCaliber: 308 WinBarrel Length: 18"Capacity: 20+1Safety: Manual ThumbStock Description: Magpul CarbineMuzzle: A2 Flash HiderReceiver Material: AluminumSights: A2 FrontBarrel Description: Chrome Moly VanadiumTwist: 1:10"Barrel Length Range: 18" to 18.99"Stock Finish Group: Black