This Williams Gun Sight Company manufactured WGRS series receiver sight with open sight blade green fiber optics and both mounting screws is for the Winchester model 1400 Slug Hunter semi-auto shotgun with a factory drilled and taped receiver and is in as new condition. The receiver sight mounts on the top rear section of the receiver where your scope mounting base would normally attach.  (file photo)

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