Holosun’s Advanced Enclosed Micro Sight or AEMS, is a ultra-compact reflex sight that comes packed with features. It comes equipped with Holosun’s exclusive Solar Failsafe to keep the optic powered in the event of a battery failure. The AEMS also features Shake Awake technology which utilizes an on-board motion sensor that activates the sight at the slightest movement. Not only does this greatly increase battery life, but also makes the AEMS always at the ready. In addition, the AEMS features a wide field of view, and is 11% shorter than most traditional 20mm micro sights. Features of the Holosun Advanced Enclosed Micro Sight: Shake Awake Technology Solar Failsafe Removable flip-down covers Holosun AEMS Red Multi-Reticle Micro Reflex Sight w/Solar Failsafe & Shake Awake RONIN-AEMS-MAX-RD