AmeriGlo brings a clear advantage to your shooting experience on and off the range. An excellent design for all shooters, the i-Dot sights provide a quick and easy vertical sight alignment. It utilizes a dot over dot configuration, and has an extended rear sight for increased sight radius with a glare reducing undercut rear face. This model has a green tritium front with LumiGreen outline and green square notch rear. It is compatible with Glock 17,19,19x,26,34,45 Gen5.