Hi-Viz FASTDOT H3, For Sig Sauer P320/P365, Tritium/Fiber Optic Night Sights, Red Front With Green Rear GSG320FD21 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 Sig P320" P365 in 9 mm with fixed sights only" non optic ready models.