HRBLW01 Ruger mark 11 and mark 111 interchangeable litewave front handgun sight. HiViz Ruger mark II and mark III interchangeable litewave front sight - skeletonized sight body. Fits Ruger mark II and mark III heavy barrel guns including 22/45 with adjustable rear sight only, does not fit 22/45 Lite model. Also fits Browning Buck mark pistols (except challenge, 5.5 target, and 5.5 field). will fit Ruger single six revolvers with adjustable rear sights. Includes three Lite pipes in Red fiber optic family Lite Pipe, green and white and key to change Lite pipes. The new litewave sight design from hiviz features an innovative, diagonal-wave design that increases durability to the protective exoskeleton and allows for more exposed surface area for the LitePipe to Gather light from all angles, for the brightest sight available. Specifications: - fit: Ruger MKII, mkiii, Buckmark, single 6 - manufacturer: Hi-Viz - manufacturer part #: HRBLW01 - model: litewave - size: sight.