Features: Tritium front and rear with high contrast glow dot Photoluminescent glow dot absorbs ambient light and glows in low light Wide notch rear with serrations and anti-reflective lens Corrosion resistant Black Nitride surface finish Traditional 3-dot tritium, notch and post, sight picture Compatible with Glocks Gen 1-5, including MOS models Proudly manufactured in Fort Worth, TX Fits Glock Suppressor/RMR Height 20,21,29,30,30S,37, & 41