DPMS AP4 Carbine

16" Length w/A2 flash hider (birdcage). 4140 chrome-moly steel AP4 style contour Manganese Phosphated 6 grooves, right-hand 1x9 twist, button rifled. Chamber: 5.56x45mm. Method of Operation: Gas operated rotating bolt. Bolt & Carrier: 8620 steel bolt carrier, heat treated and plated per Mil Spec Phosphated steel bolt, heat treated and plated per Mil Spec. Sights: A2 front sight Assembly. Upper Receiver: A3 Style with detachable carrying handle and and rear sight adjustable for windage and elevation, Forged 7075-T6 aircraft aluminum alloy Hard coat anodized per Mil Spec and Teflon coated black. Dust cover. Shell deflector. Round forward assist. Right hand ejection. Lower Receiver: Forged 7075-T6 aircraft aluminum alloy Hard coat anodized per Mil Spec and Teflon coated black. Semi-auto trigger group. Aluminum trigger guard.