The Sightmark Ultra shot R-Spec Reflex Sight delivers a crisp field of view with an advanced, anti-reflective, scratch resistant lens system, 4 red and green reticle options with10 brightness settings, parallax correction (beyond 25 yds), 1 MOA Click adjustments (120 MOA of travel), Interlok internal locking adjustment system and a long, reliable battery life, from 200 to 2000 hours on a sincle CR123 battery. Includes a quick-detach picatinny mount, adjustment tools, CR123A battery, operation manual and neoprene cover.