AmeriGlo Optic Compatible Sets for Glock, For All Glocks, 3XL Tall, Green Tritium with White Outline, .365 Front and .451 Rear, Black Rear Sight GL-491 AmeriGlo sights are constructed from high quality materials in order to provide you with a superior aftermarket sight option for your Glock firearm. This sight set with flat black rear and tritium front was designed for use on Glock MOS pistols with Trijicon RMR/SRO and Holosun 407/507/508T optics. Whether you use your firearm for personal protection or just plinking at the range AmeriGlo sights has you covered.