The Trijicon ACOG has become a sought after weapon sight due to its large field of view, ability to get on target quickly and incredible durability. This particular ACOG sight comes with 3.5x magnification and a LED illuminated reticle, making it the first ACOG to have user-selectable brightness controls. The user can select between 6 different settings with the off selection in-between each increment. It takes standard AA batteries and can run continuously for 12,000 hours (on setting #4). The TA51 mount that it comes with allows this scope to be mounted easily to any standard picatinny rail section. With a bullet drop compensating reticle and night vision compatibility this ACOG is the perfect complement to a host of rifles.