US Patent 9068793 Receiver for a firearm

An upper receiver of a firearm including a body with an interior, an opening for a barrel extension, and one or more engagements for communicating with a lower receiver of a rifle; a high wear area located on the interior of the receiver; a relief cut at the high wear area; and a wear plate fit within the relief cut of the high wear area located on the interior of the aluminum body, the wear plate having an expose surface.