TRUGLO TFO Sight Set for S&W M&P, SD9, SD40 Steel Tritium Fiber Optic Green Front, Yellow Rear

The TRUGLO TFO sight are the most revolutionary innovation since TRUGLO, Inc. introduced fiber optics. TFO refers to our 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! FeaturesPatented TFO technologyCNC machined steel constructionSnag-resistant designNo batteries required