From the legendary ACOG family of products, the LED ACOG is the first to offer user-selectable brightness controls. Users can select from six adjustable brightness levels with an "off" between each setting, allowing the operator to determine how much to illuminate the reticle - even in transitional lighting. Powered by a single AA battery, the LED ACOG can run for over 12,000 continuous hours (on setting #4). The body has been optimized by moving the RMR mount forward to maximize its performance in conjunction with the ACOG. Like all ACOG models, it is forged from rugged 7075-T6 aircraft-aluminum, resulting in a nearly indestructible sighting system and electronics that offer outstanding reliability. Fully night vision device compatible, the Trijicon 4x 32mm LED ACOG is also compatible with most other 4x 32mm ACOG accessories available. Includes:TA51 flattop mountAA batteryLenspen Lanyard assembly for adjuster capsLanyard assembly for battery cap