Specifically designed for rail-equipped rifle and carbine applications, the Holosun AEMS CORE Green 2 MOA Dot Reflex Sight is a performance-enhanced tactical sight, built around a durable 7076 T6 aluminum housing for lasting field service in virtually any environment. This lightweight green dot sight features an illuminated 2 MOA reticle for intuitive target acquisition, while 12 user-selectable brightness settings (10 daylight; 2 night vision) deliver exceptional clarity in any lighting condition. Shake Awake™ technology automatically activates the reticle when it detects motion for reliable, hands-free activation, and automatically powers down the unit when the weapon is idle for unparalleled battery conservation and multilayer reflective glass lenses deflect stray light away from your eye for exceptional clarity and reduced eye fatigue. Operates on one CR2032 battery (included). Up to 50,000-hour battery life. IPX8 waterproof.