Original longrifles were nearly always fitted with "fine" (low) sights, in the mistaken belief that the low sights reduced sighting error. Too low for good target work, use it to restore or replicate an original antique rifle. Wax cast with a 1" dovetail, about .535" wide for use on a 13/16" or 7/8" barrel. Dovetail to a depth of .050", the blade will stand .23" above the plane of the barrel.
