MPSLW11 interchangeable litewave rear handgun sight. HiViz Smith and Wesson MandP shield litewave interchangeable rear sight. Fits MandP shield in 9mm and .40 Smith & Wesson caliber. Includes Lite pipes and key to change Lite pipes. The 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: - accessories: include LitePipes and key - description: rear only - fit: 9mm, 40S&W, 357Sig - manufacturer: Hi-Viz - manufacturer part #: MPSLW11 - model: litewave - size: sight