This Williams Gun Sight Company manufactured green fiber optic short ramp front sight is for the Thompson Center Triumph in-line muzzle loading rifle when used with the Williams red fiber optic rear sight assembly and is in excellent condition with light wear. The mounting screw is sold separately.  (file photo)

Note: Thompson Center Triumph muzzle loaders with the following serial numbers have been observed with this part:

Rochester, NH: 40043

Springfield, MA: