ATN Day Vision AR-15 Scope 5x33L IR 30mm Tube ATN uses the purest grades of heavy glass and computer aided optical designs. All lenses are multi-element, high aperture and multi coated. Night vision devices utilize only the best hand selected Image Intensifier Tubes. Material range from titanium, aircraft quality aluminum to hi-impact plastic. All unit feature O-rings, nitrogen purging and hard exterior coating. ATN 5x33L Day Scope is the best illuminated Reticle Rifle Scope on the market for .223 caliber weapons. User friendly by design, the ATN Professional 5x33L scope is simple to use while sporting some of the most advanced features available today. Features include: 1/8 MOA adjustments, German quality multi coated optics, virtually unbreakable illuminated reticle with 10 position brightness adjustment. Also features: internal 500 yard bullet drops compensator for .223 caliber with 100 yard increments, built in 500 yard range finding system, 30mm tube and 5x magnification. All ATN units come with batteries. For all warranty claims, please contact ATN Warranty center directly at 1-800-910-2862 for repair or replacement. Non Returnable to Cheaper Than Dirt!