The Mepro M22 is the next generation of the legendary Mepro M21 Reflex Sight, used for decades by the Israeli Defense Force, Militaries, and Law Enforcement agencies worldwide. Smaller and more compact, the Mepro M22 reflex sight with fiber-optic illumination by day and premium Swiss-processed tritium vials by night that will operate in any lighting condition. No batteries needed, ever. The transition between the two systems is instantaneous. Its rugged, battle-proven construction meets or exceeds rigorous standards to function in the harshest environments.Reliable in any weather conditions, the Mepro M22 is suitable to use with NVDs as well as magnifiers. Tritium luminance is warrantied for ten (10) years.FeaturesAlways on, no battery needed technologyTritium PoweredCompatible with MagnifiersMulti-Tool Included for AdjustmentsIlluminated is auto-adjusted based on ambient light