Anderson’s Mil Spec AM-15 T-Marked stripped Upper Receiver is machined from 7075 T6 Aluminum forging. Featuring M4 feed ramps, this upper receiver is machined to Military Specifications & Standards and can be used with multiple calibers on the AR-15 platform. These uppers are laser engraved, T-Marked after anodize and white in color. This upper receiver comes in type III black hard anodize, black in color. Match this Upper with one of our Lower Receivers for a solid fit.