EOTech 5-25x50 Vudu precision riflescope is designed for use with short-platform rifles. The optical system features bright and clear XC high-density glass treated with broadband anti-reflection multi-coatings to deliver bright, clear, low-distortion, and high-contrast Images. The wide 50mm objective aperture fills the niche for gathering enough light to produce visible Images in the most challenging lighting conditions, where standard apertures fail. The MD3 reticle in the first Focal Plane offers brilliant Red illumination with adjustable brightness and automatically shuts off after two hours of non-operation..