The TRUGLO Trushot Sereies of scopes are waterproof / fog-proof / nitrogen gas-filled. Duplex reticle. Generous eye relief. Fully-coated lenses provide maximum brightness, clarity and contrast. Rubber eye-guard. Removable lens caps included. Coin-style windage and elevation adjustment under screw down caps. Durable leaf spring for windage and elevation adjustments. One-piece tube made of aircraft quality aluminum. Durable, scratch-resistant, non-reflective matte finish.