16" Length 4140 Chrome Moly Steel 6 grooves, right-hand 1x10 twist,button rifled .308 A2 Flash Hider Koebl Single Rail Gas Block Chamber: 7.62 NATOMethod of Operation: Gas operated rotating bolt Bolt & Carrier: 8620 steel bolt carrier, heat treatedand plated per Mil Spec Phosphated steel bolt, heat treatedand plated per Mil Spec Sights: None (mounting optics only) Weight: Empty - 8.3 lbs. Length: 32.5" Collapsed 36.375" Extended Upper Receiver: Thick walled, extruded from 6066-T6 aluminum Hard coat anodized per Mil Spec No dust cover Snag free design, smooth side look No shell deflector No forward assist Right hand ejection Raised Picatinny rail for easy scope mounting Lower Receiver: Milled from a solid billet of 6061-T6 aluminum Hard coat anodized per Mil Spec Integral trigger guard Aluminum magazine release button Standard AR-15 trigger group Stock:DPMS 6 Position Pardus Stock Handguards: Carbine Length GlacierGuards™