The NVWS18 is a rugged, top of the line night vision weapon sight designed to handle medium to large caliber weapons and with 5x magnification, infra-red sensitive lenses and top of the line image intensifier tubes give the NVWS18 an extremely sharp resolution with high light gain. 1/8 MOA adjustments for windage and elevation make the NVWS18 a highly accurate medium to long range nighttime scope. For the NVWS18 we use a top of the line "Prime Select" US 2 Gen+ light intensifier tube for added light gain and resolution. Combine this select tube with 5x magnification and a super fast F:1.4 lens the image that you will get out of your NVWS18 is unbelievable. The best optics, tubes and a 3 year warranty makes the NVWS18 crusader one of the best night vision weapon sights there isis a true Aries Night Vision Weapon Scope. ATN manufactures the largest line of night vision weapon sights or night vision scopes or just night scopes. By utilizing the current military designs we have developed the most advanced NVD riflescopes commercially available. Our "Red on Green" rear projection aiming system provides the user with a sharp reticle allowing fast and effortless target acquisition. T Aries NVWS18-2 uses Gen 2 image intensifier and easy to operate night scope and incorporates a weaver style mounting base. ATN NVWS18 Crusader is the choice as Police and Military night vision.