This fixed rear sight provides a little help for older eyes. This sight base may easily be shortened to fit a more narrow dovetail. Always file the sight, never file the barrel.
This sight is designed for use on a longrifle with a 13/16" or 7/8" octagon barrel, or a swamped or tapered barrel of that size.
The dovetail is about .750" long, as cast, and the base is .530" wide. The center of the aperture is .315" above the bottom of the as-cast sight. Thus, the center of the aperture will be about .265" above the top flat of the barrel, assuming a typical .050" rear sight dovetail depth. Wax cast steel, not polished, made in the U.S.A.