Hi-Viz GSG320FD21 Fastdot H3 Sight for Sig P320/P365 9mm 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.Features :Red Front with Green RearFor Sig P320, P365 in 9MM with Fixed Sights OnlyTritium and Lightpipe Technology with 24 Illumination