GLLW19 interchangeable litewave rear handgun sight. HiViz Glock litewave interchangeable rear sight 45 ACP, 10mm and 45 gap (sight height is 6.9 mm). includes Lite pipes 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: - litewave interchangeable front sight - diagonal-wave design for increased durability and brightest sight - skeletonized sight body - fits Ruger mark II and mark III heavy barrel guns including 22/45 with adjustable rear sight only