The XS Standard Dot Ember upgrades an LCR to a high-contrast front sight that absorbs light and glows in less than ideal conditions. Optic Orange is designed to offer a high-contrast sight picture when shooting in bright light conditions and maintain its visibility in decreasing light levels. To ensure visibility in low light when uncharged" optic orange is primarily based on yellow with a hint of red. The increased surface area of the convex dot increases light absorption" intensifying the charge of the glow properties of the dot.Features :"Fits Ruger LCR in 9mm" .22LR" & .22WMR""Outside Diameter Standard Dot 0.140";"Sight pre-drilled and comes with new retaining pin and thread locker"Fits in common holsters