Optimize your rifle/shotgun with Meprolight’s series of TRU-DOT Self-Illuminated Night-Sights. Test results by both entry-level and expert-level marksmen have shown an increase in hit efficiency by over 85% when using TRU-DOT sights, and are compliant with the exacting specifications of the US Military and NATO. These sights are available in a wide assortment of configurations to suit individual platforms, and are identical in appearance regardless of the lighting conditions. Features of the Meprolight TRU-DOT Rifle/Shotgun Sights. Tritium illumination Easy installation Seamless transition from day to night use Available in a wide assortment of configurations to suit individual platforms Meprolight Tru-Dot Mossberg M500 (5 40 Bead Sight) Green Fixed Shotgun Front Sight 1340443101