DPMS M4 5.56x45mm NATO 16 inch Upper Receiver w/Rear MBUS One Size

DPMS M4 5.56x45mm NATO 16 inch Upper Receiver w/Rear MBUS One Size. Chambered in 5.56 NATO with a 1/7in twist M4 barrel extension and a carbine-length gas system. This M4 profile barrel is finished off with a standard handguard F-Marked gas sight base and A2 flash hider. Upper: Forged 7075-T6 A3 AR upper is machined to MIL-SPECS and hard coat anodized. These uppers are made for us right here in the USA by a mil-spec manufacturer. Bolt: Full-auto profile bolt carrier group. Milspec Carpenter No. 158 steel bolt Shot Peened High pressure tested Mag particle inspected Gas Key Hardened to USGI Specifications Fastened with Grade 8 screws and Staked Per Mil-Spec. Specifications for DPMS M4 5.56x45mm NATO 16 inch Upper Receiver w/Rear MBUS: Manufacturer: DPMS Caliber: 5.56x45mm NATO Barrel Length: 16 in Gas System Length: Carbine Length Barrel Twist Rate: 1-7 Finish: Phosphate Barrel Material: 41V50 Chrome-Moly Vanadium Steel Package Contents: DPMS M4 5.56x45mm NATO 16 inch Upper Receiver w/Rear MBUS DPMS DP51655109558: M4 5.56x45mm NATO 16 inch Upper Receiver w/Rear MBUS One Size