Ameriglo’s Protector series are an excellent choice for concealed carry and personal defense applications, and offer faster front sight acquisition. The front sight is composed of a tritium ProGlo lamp (with either a LumiGreen or Orange outline), and the rear sight features serrated rear notch which reduces glare and offers assistance for one-handed slide manipulations. This configuration allows the shooter to concentrate on the front sight blade for faster target engagement. Ameriglo Protector Green Trit w/LumiGreen Outline Front, Black Serrated U Notch Rear Sight Set for Glock Gen 1-4 17,19,22-24,26,27,33-35,37-39 GL-354