Utilizing a dot over dot configuration, the Ameriglo i-Dot Night Sights have an extended rear sight for increased sight radius with a glare reducing undercut rear face. An excellent design for all shooters, the i-Dot sights provide a quick and easy vertical sight alignment. AMERIGLO is committed to manufacturing the highest quality tritium, painted dot, fiber rod, and custom OEM iron sights for the modern hand-gunner. With the largest selection of set options for leading firearm brands, AMERIGLO brings a clear advantage to your shooting experience on and off the range. DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.