This Winchester manufactured 15 round metal constructed magazine assembly is for the U.S. military model M1 Carbine semi-auto rifle and is in near excelent condition with light wear. It is a type II magazine which has a ridge in the floorplate. This magazine does not have a hole in the rear bottom of the body; nor does it have one in the floorplate. A circle encloses the IW marking. Winchester was a wartime manufacturer of these magazines. (file photos)