The Sightmark Ultra Shot R-Spec Reflex Sight / Dark Earth turns up the heat on your range time with ultra-fast target acquisition and seriously long battery life, from 200 to 2,000 hours on a single CR123A battery. The Ultra Shot R-Specs premium wide-angle lens system with scratch resistant and anti-reflective silver coating, 4 illuminated red/green reticle options with 10 brightness settings, parallax correction (beyond 25 yards) and unlimited eye relief deliver a crisp, robust field of view and uncompromising reliability. Built tough, the Ultra Shot R-Spec Reflex Sight is shock proof, IP55 weather-resistant, recoil rated up to .50 BMG and constructed of a rugged, lightweight 6061-T6 aluminum body and protective shield. 1 MOA windage and elevation adjustments, up to 120 MOA of travel, get you on target quickly and keep you there with an Interlock internal locking adjustment system, for precise, repeatable shooting from any range your comfortable shooting at 1x magnification. The Ultra Shot R-Spec Reflex Sight also features a low battery indicator, digital switch controls, 1-hour auto shut-off, quick-detach picatinny mount and Sightmark's lifetime warranty.