Williams FireSights for Ruger MKIII 22/45 LITE - 71053 - EAGLE LOGO PLEASE CAREFULLY READ PRODUCT DESCRIPTION "Click" elevation and windage adjustments For use on Ruger Mark III 22/45 Lite WITH Ruger Logo on Stock Rear Sight OR Mark IV 22/45 LITE Precision made out of Blued Steel and Aluminum Fiber Optic sights for improved sight picture