From opticsplanet.com :
The Burris AR-536 Prism 5x 36mm Tactical Red Dot Sight, Ballistic CQ Reticle sets the standard for tactical prism sight performance. The 5x magnification on this Prism Sight by the specialists at Burris makes it easier to find and engage targets out to 600 yards, while the larger 36mm objective delivers brighter, crisper images. The Burris Prism AR536 Tactical Red Dot Sight features five different illumination settings that make it easy to match any light condition. This Burris Red Dot Sight is built with the proven Ballistic CQ lighted reticle that is ideal for tactical operations or friendly competition. The Burris Prism AR536 Reflex Sight will stand up to recoil, abuse and weather. The Burris 5x36mm Red Dot Prism Weapon Sight includes multi-coated lenses, an adjustable diopter, an integrated lens covers and three Picatinny rail mounting points.