FREE FAST SHIPPING!! The ATN Z-series daytime scopes are not an evolution but a revolution, not an improvement, but a breakthrough. For years 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" environment. Nevertheless, the "let's get a Big Hunting scope and put a Mil-Dot in it and call it "Tactical" approach always led to a problem with uncomfortably high mounting. The new Z-series prismatic design solves all the problems, and allows a sniper to use a scope with 65mm aperture that sits closer to the barrel than a standard 40mm scope. With a sharp crisp image, workable size, high durability and with abundance of features like illuminated Army Mil-Dot reticle, interchangeable Bullet Drop Compensator for five different calibers, "will-notbump" eye relief and parallax adjustment the ATN Z-series daytime scopes are a standard not an option for LE marksmen and military sniper alike. Magnification 16X Objective diameter 65MM FOV 3 deg. Mounting Built-in monorail Bullet drop calibers .223, .300,.308, 30-.06, .270, 50BMG Rangefinding 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 2.5" (65mm) Power source 3V (CR2432 OR CR2032) Battery life 100 HOURS Sun shade YES Windage&elevation adjustments