This is a AmeriGlo Sight known as the Pro-Glo, model GL-243.
Sight set with green tritium lamp" orange or luminescent green outline front and two green tritium lamp" white outline rear for Glocks. Highly visible under all lighting conditions. LumiGreen paint will glow brightly for 10 minutes after light exposure.
Features:
Green tritium lamp with lumen green outline front;Green tritium with white outline rear