Strike with precision using the Holosun® HS407C-GR X2 Green Dot Open Reflex Sight. Specifically designed for optics-ready pistol applications, this parallax-free reflex sight features a 2 MOA dot reticle with 12 user-selectable brightness settings (10 daylight; 2 night vision) for reliable clarity and intuitive target acquisition in any light condition. Shake Awake™ technology automatically activates the reticle when it detects motion for speedy, hands-free activation, and automatically powers down the unit when the weapon is idle, and Solar Failsafe™ technology harnesses the sun’s energy to power the unit in daylight environments, conserving precious battery life for overcast or low-light conditions. Multilayer reflective glass lenses deflect stray light away from your eye for exceptional clarity and reduced eye fatigue. Better yet, the 7076 T6 aluminum housing delivers lasting shock and corrosion resistance for reliable field performance. Operates on one CR1632 battery (included). 50,000-hour battery life. IP67 waterproof.