This Williams Gun Sight Company manufactured Twilight aperture is designed to attach to any of the Western Precision series receiver sight bases and is in as new condition. The Twilight style 3/8" aperture with the short 5/16" in length stem and has a .093" sighting peep hole.  (file photo)

Inform us: We would like to know if this product is available in new conditon with unlimited availability on any other parts supplier's website with a lower price tag.