The Blemished AM-15 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. This upper receiver comes in type III hard coat anodize, black in color. This Upper Receiver does come with cosmetic blemish’s and will be correct dimensions. Match this Upper with one of our Lower Receivers for a solid fit.