It is back and better than ever!!! AMERIGLO ProGlo GREEN PHOTOLUMINESCENT WITH ROUND FRONT PROFILE. 9MM/40/357/45 GAP FRONT SIGHT ONLY. This sight is awesome it offers the best features of the XS and the TRU-GLO but is brighter and enables you to make very fast and accurate shots. It does not blot out the target and glows like a light bulb. Your eyes will instantly be drawn towards the light! Dave Spaudling a Retired Police Lieutenant, Renowned Gun Writer and Tactician stated that these sights maybe the "best ever invented". We agree and so will you!