XS Sights XS 24/7 Big Dot Sight, fits Glock 9MM/40/357/36

The XS DXT Big Dot night sight is the ultimate defensive sight set. Fits Glock models 17" 19" 22" 23" 24" 26" 27" 31" 32" 33" 34" 35" & 36. Precision machined in Fort Worth" TX" XS Sights feature a Big Dot Tritium front sight and express rear sight with a vertical tritium stripe for fast sight acquisition in all light conditions. Big Dot demands your attention - even in high stress and for those with poor eyesight" aids in rapidly achieving combat effective hits. White dot reflects ambient light for best visibility in low light. Shallow V-Notch rear provides an unobstructed view of the front sight" along with a greater field of view down range" especially when moving and shooting. Day-Light" Half-Light" or Low-Light" just "dot the i" and center the dot over your target within 15 yards. Outside Diameter Big Dot 0.188