The ATN 10x65Z-Army Mil-Dot Night Vision Scope, is not an evolution but a revolution, not an improvement, but a breakthrough. For years the best names in optics were aspired to produce a balanced large aperture tactical scope. Large aperture renders into large Exit Pupil. Large Exit Pupil means longer operating hours and better performance in low light conditions and in "stressed" environments. Nevertheless, the "let's get a Big Hunting scope and put a Mil-Dot in it then call it "Tactical" approach always led to a problem with uncomfortably high mounting. The new ATN 10x65Z-Army Mil-Dot prismatic design solves all these problems, and allows a sniper to use a scope with a 65mm aperture that sits closer to the barrel than a standard 40mm scope. With a sharp crisp image, workable size, high durability and an abundance of features like an illuminated Army Mil-Dot reticle, interchangeable Bullet Drop Compensator for five different calibers, "willnot- bump" eye relief and parallax adjustment the ATN 10x65Z is a standard not an option for LE marksmen and military snipers alike. Features: Patented prismatic design All highest grade heavy glass multicoated optics Extra large objective lens Built-in Bullet Drop Compensator Parallax adjustment Illuminated Army Mil-Dot Reticle with 12 position rheostat Reticle locking mechanism 1/8 MOA at 100 Yards "Will-not-bump" eye relief Built-in Mounting system Sunshade Front Lens Cover Magnification 10X Objective diameter 65MM FOV 3 deg. Mounting Built-in monorail Bullet drop calibers .223, .300,.308, 30-.06, .270, 50BMG Rangefinding 1000M (1800M FOR.50BMG) Illuminated reticle YES Dimensions 361MM X 84MM X 138MM / 14.2" X 3.3" X 5.4" Weight 1.6KG Eye relief 75MM Power source 3V (CR2432 OR CR2032) Battery life 100 HOURS Sun shade YES Windage&elevation adjustments