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. GLLW11 is 6.1mm high, and fits models 42 and 43. GLLW15 LITEWAVE Rear Sight is 6.5mm high, and fits 9mm, .40 S&W, and .357 Sig models. All rear sights include red, green, and black LitePipes. Mfg: Hiviz