If you shoot suppressed or have a Trijicon RMR^® red dot sight with your Smith & Wesson^® pistol (such as the C.O.R.E. Performance Series of pistols), upgrade your iron sights with Trijicon® Suppressor/Optic Height Sights. They give you an instantly visible sight picture in low-light and no-light situations thanks to tritium technology and sapphire jewels (for an even distribution of light), and their increased height accommodated multiple shooting applications.