The GLx MD-21s is a high-performance micro dot optic built for superior agility and precision from close-quarters to intermediate range. This red dot features an advanced solar failsafe system supplementing your power supply to ensure the optic operates with maximum runtime. On top of the solar failsafe this red dot sight also features Autolive technology that turns the reticle off when set down for two minutes and immediately turns on the moment it is picked up. In addition this optic features fully upgraded lenses a new ultra-bright emitter intuitive push-button controls and a heavy-duty mounting system. Check out the SLx 2.26″ Mount if you plan on setting up your firearm for night vision shooting or you prefer a more heads up shooting position. The Red Dot Bright reticle can be cycled through 12 different settings and is night vision compatible for full operability in any environment.