This Williams Gun Sight Company manufactured WGRS series ghost ring green fiber optic receiver sight with both mounting screws is for the Thompson Center Encore 209x50, Encore Prohunter, Endeavor, Impact, Omega, Scout &  Triumph in line muzzle loading rifles and is in new condition.  (file photo)

Warning: when using this receiver sight, you may find it necessary to use a taller front sight such as the Williams .570W gold bead front sight.

Note: This is a CFnParts exclusive non-catalogued Williams Gun Sight Company manufactured receiver sight