This receiver sight, based on Lyman's famous 1895 patented Model #21 sight, is designed to operate on most models of Winchester Model 95 and 86 rifles. Consisting of machined steel and brass components entirely made in the USA, the sight comes with what you see plus three full pages of instructions. Comes with a tap, which is needed on most firearms, please read the instructions. The manufacturer states that saddle rings and studs MUST be removed from firearms for this to work on your saddle ring carbine.