A reproduction of the tang sight that came on the Remington Walker Hepburn rifle. This vernier tang sight has 3 1/2" of elevation and is marked in .010" increments. That is 1" at 100 yards with a 36" sight radius. Windage adjustments are marked in .020" increments or 2" at 100 yards with a 36" sight radius with 26 minutes of windage either side of zero. This sight works well with muzzleloaders, Martini Henrys, Trapdoors that need to have sights that adjust low enough to be on at 100 yards.
Be sure your are ordering the correct sight for your rifle. There are absolutely no returns on sights that have been mounted.