Designed as the first ACOG optic from the company that enables users to select from custom brightness settings, the Trijicon ACOG ECOS 4x32mm LED Scope allows for unprecedented versatility when it comes to setting up an optic for any scenario. The Trijicon ACOG ECOS 4x32mm LED Scope uses a single AA battery, which can be found easily in any area and can be carried without issue. The battery powers the optic for an amazing 12,000 continuously when used on a mid-range setting. For enhanced durability, the sight is constructed with a housing machined from 7075-T6 aluminum. Uses Red Crosshair 223 Ballistic Reticle Includes RM06 RMR red-dot optic Weighs 20.5 ounces Mfg: Trijicon