Glock Express Sights 20-21-29-30-37

XS 24/7 Express sights are the finest sights made for fast sight acquisition in all light conditions. Day-Light, Half-Light, or Low-Light, just “dot the i”. Fast, simple, and effective. This is the ultimate self defense sight system that provides sights you can see around the clock. Some gunsmithing may be needed for installation.