4-16×50 AOIR Variable Long Range Rifle Scope.  The versatile 4-16x zoom optic is constructed from durable T6 6061 aircraft aluminum, features a large 50mm objective lens with full multi-coated green optics, maximizing light transmission for sharp, bright sight images during low-light dawn and dusk. The wire reticle comes with dual red & green illumination powered by a single CR2032 battery, adapting to all lighting conditions. An adjustable diopter eyepiece lets you sharpen the reticle to match your eyesight, paired with consistent eye relief for comfortable, recoil-safe aiming.