This is a TruGlo Tru Brite Extreme Tactical Compact Rifle Scope 4X32mm. Dual color illuminated reticle allows choice of red or green for faster target acquisition in low light conditions. Mounts to a Weaver style mount (Weaver-style rings included) or 3/8" rail. Waterproof/fog-proof/nitrogen gas-filled. Generous 4" eye relief. Fully coated lenses provide maximum brightness, clarity and contrast. Adjustable rheostat for brightness control. Rubber eye guard. Finger tip windage and elevation adjustment. Durable leaf spring for windage and elevation adjustments. One piece tube made of aircraft quality aluminum. Durable, scratch resistant non reflective matte finish. Lifetime limited warranty from the manufacturer.