The ATN MK 410 Spartan is one of the best 1st Generation Night Vision scopes on the market. Powerful 5x magnification, improved optical configuration, low F-stop factor and increased optical resolution allow more light to travel through the lens to the tube. More light and better resolution means brighter and sharper image. Precision "Red on Green" aiming system, easy push button operation, reticle brightness adjustment and detachable most powerful in the industry 450 mW Infrared Illuminator in a couple with rugged, weather resistant design make the ATN MK 410 Night Vision scope one of the best scopes for night hunting. This system easily mounts onto any U.S. standard 7/8" weaver or Picatinny rail.