The Primary Arms SLx MD-25 Gen 2 Microdot now comes with AutoLive, improving the functionality of an already amazing red dot sight. Stretch that already insanely long battery life even further and remove that fear of picking up your rifle and the dot not being there. With this red dot sight, the moment you pick up your rifle, the dot will turn on and be ready precisely when you need it. After sitting motionless for a brief period of time, the red dot will shut off and conserve battery. Still featuring the same lightweight and durable design with a field of view that rivals larger 30mm red dots, the MD-25 Gen 2 is a no-brainer upgrade to add to your collection. FeaturesAutolive Auto On/OffWide Field of ViewUp to 25,000 Hour Battery LifeNight Vision CompatibleCompatible with Aimpoint Micro and Microdot Mounts