LiteWave Sights, The ability to gather light from nearly any angle, along with the versatility of interchangeable LitePipes; All sight bases are solid steel construction; Interchangeable style; Includes three LitePipes in red, green and white; Litepipes store in litepipe changing key; For Ruger MK I, II, III and IV models; Does not fit 22/45 Lite model; Fits Ruger single six revolvers with adjustable rear sights; Also fits Browning buck mark pistols (except challenge, Buckmark 5.5 target, and Buckmark 5.5 field)