Front dot front only green tritium with orange outline .315" front and black .394" rear XL. Suppressor height sight sets for all Glock Models excluding 4243. Will work with most optics co-witness; some optics will require taller sights and should select the 'Tall Optic Height' model. All tritium sets use green tritium. LumiGreen paint will glow brightly for 10 minutes after light exposure.