This Inland manufactured 15 round metal constructed magazine assembly is for the U.S. military model M1 Carbine semi-auto rifle and is in good condition with light wear and some rust present. It is a type I magazine which does not have a ridge in the floorplate. This magazine does have a hole in the rear bottom of the body; but does not have one in the floorplate. The A.I. marking has a line below it; but not above it. Inland was a wartime manufacturer of these magazines. (file photos)