The GL0011P3Y XS Sights DXW2 Big Dot Tritium Night Sights provide unparalleled front sight visibility in any lighting context. They\'re specifically designed to direct your focus towards the front sight through their high-contrast front and V-notch rear, thereby ensuring a clear view of the front sight at all times. Notably, these front sights deploy a unique, patent pending glow dot. This innovative feature functions by absorbing light, and begins to glow in low light conditions, even before the environment gets dark enough for the tritium to be visible.