TruGlo Brite-Site TFO Day/Night Front Green/Rear Green Sight Set, Glock 42 & 43

The TFO gun sights use the same proven technology as their TFO archery pins. These sights are the most revolutionary innovation since TRUGLO, Inc. introduced fiber-optics. TFO refers to their patented combination of Tritium and Fiber-Optic technologies. The Tritium maintains the brightness level of the sight in low-light or no light conditions. That means you can see your sight even in complete darkness, with perfect transition through all lighting conditions. Tritium does not need batteries and does not need to be charged with light. it simply glows.