XS Sights SW0029S5Y DXT2 Big Dot Night Sights- Smith and Wesson Black | Green Tritium Yellow Outline Front Sight Green Tritium White Outline Bar Rear SightDXT2 Night Sights are defensive tritium sights designed to enhance your EDC pistol. The front sight uses a proprietary photoluminescent Glow Dot that absorbs ambient light and glows in low light. The convex dot's additional surface area increases light absorption, intensifying the charge of the Glow Dot. We designed the DXT2 sights to be large and highly visible; this helps solve many issues, from aging eyes to deteriorating vision. We've found that