Holosun Technologies AEMS, Red Multi-Reticle System, 2MOA Dot With 65MOA Circle, Fits 1913 Picatinny Rail, Lower 1/3 Mount, Up To 50,000 Hours of Battery Life, Shake Awake Technology, Black AEMS-211301 Holosun AEMS combines a large field of view in a compact, lightweight package. AEMS has double the glass surface area and is 11% shorter than standard 20mm micro style optics and weighs just 3.9oz. AEMS is equipped with Holosun innovations like Solar Failsafe, Shake Awake, Multi-reticle System, and up to 50k hour battery life. AEMS features a 7075-aluminum housing with removable, clear, flip-down lens covers. The included lower 1/3 co-witness mount is removable providing adaptability across multiple firearms platforms.