XS DXT2 Standard Dot Night Sights offer superior front sight visibility in all lighting conditions. DXT2 Standard Dot sights drive focus to the front sight using a high-contrast front and a low-profile V-notch rear. DXT2 Standard Dot front sights use a patent pending glow dot that absorbs light and glows in low light levels before it is dark enough to see the tritium. The increased surface area of the convex dot increases light absorption, intensifying the charge of the glow properties of the dot. The dot-the "i" sight picture, with a tritium dot in the front sight and a tritium bar in the rear, prevents confusing the front and rear sight in high-stress situations. In most gun Mfg: Xs Sight Systems