Amason Electro DOT Sight Field Sport Red and Green Reflex Sight with 4 Reticles 4 Reticle Patterns in Green or Red offer Unlimited Eye Relief and Corrected Parallax Built-in 20mm Picatinny Mount Base for Easy Sight Remounting 33mm Lens provides a Wide Field of View for aiming Allen Head Screw Type Windage and Elevation Click Adjustments with Locking Screws Caution:Reflex Sight is used for Airsoft Gun Paintball Gun and Handgun.