Hi-Viz FASTDOT H3, For Smith & Wesson Shield/Shield Plus, Tritium/Fiber Optic Night Sights, Red Front With Green Rear GMPFD21 HIVIZ FASTDOT H3 is a unique low profile single dot sight system that combines both fiber optic and tritium for 24 hour illumination. Featuring a red front sight" green rear sight with a 12 year Tritium warranty. For Smith & Wesson M&P compact" fullsize" and Shield and Shield Plus in all calibers" does not fit optic ready models" 9EZ or EZ 380.