Open target turrets Full multi-coated lenses Built in sunshade Quick focus eyepiece Ultra bright red and green illuminated reticle Waterproof, fog proof, shock proof Universal fit to all weaver rail systems (mount is width adjustable for universal easy mounting). For Airsoft use. Limited lifetime warranty In the Box AIM Sports Tactical P4 Sniper Scope (2.5-10x40) w/ QD (quick detach) mount lens covers battery comprehensive instructional guide and installation information/recommendations. Specifications: Magnification 2.5-10xEye Relief 3Objective Diameter 40mmTube Diameter 1Reticule P4 sniperNet Weight 16 ouncesLength 8.25 InchesClick value 1/4 M.O.AFinish Matte blackLens coating Green California Proposition 65 Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov