Image clarity and super fast target acquisition lead the innovations built into the Trijicon® AccuPoint® 3-9x40mm Rifle Scope. Superior-quality multi-coated lenses improve clarity and light transmission with zero distortion. The Red Triangle Post reticle uses the "both eyes open" Bindon Aiming Concept (BAC) so you can find and stay on your target quickly, even when it's on the move. Reticle illumination is achieved with Trijicon tritium fiber optic technology ensuring battery-free illumination during critical moments. Manual brightness override easily adjusts the intensity of the aiming point to your personal preference and surrounding conditions.