Trijicon Acog Ecos Scope/Reflex Sight, 4X32mm, Dual Illumination Red Crosshair Reticle, Blk

Internally-adjustable. Military-grade forged aluminum housing. waterproof to 100'. Dry nitrogen-filled-eliminates fogging. Maximum eye-relief. Broad Band anti-reflective coated lens-superior clarity and light gathering capabilities zero distortion. Tritium phosphor lamp guaranteed to illuminate up to 15 years. Aiming recticle glows in low-light conditions. Fiber-optics automatically adjust brightness level and contrast of recticle to available light conditions Totally battery-free. Lifetime warranty. USA made.