High Fiber Optic HiViz Front Sight gives Faster Sight Acquisition- Whether you are hunting or plinking, its often hard to see your front sight against outdoor backgrounds. The fiber optic core of this HiViz front sight puts a bright glowing dot on your front sight. You see it easily and line up your sights faster for more accurate shooting. This HiViz Litewave sight is especially designed for Stepped Bull Steel Barrels on Ruger Mark I, II, III, IV, and 22/45 pistols (Not 22/45 LITE). It's .435" height is made for the Stepped Bull target contour of these Ruger pistols and works perfectly with factory adjustable sights. This bright and durable HiViz LITEWAVE® sight will enhance your confidence and shooting experience. Designed especially for the Stepped .875 dia Bull, Steel Barreled pistols, including Ruger 22/45 (Does NOT fit the 22/45 Lite).