ATN PS22-2 Gen 2 Front Night Vision System (Day/Night Solution) which easily mounts in minutes in the front of any daytime weapon sight and gives ultimate Day/Night solution, no re-zeroing required. The day sight provides the aiming point. All of the features of your daytime scope can now be used during the night. This system is one of the most compact and lightweight Night Vision systems in its class. Multi-coated all glass optics; fast catadioptic front lens system; large 40mm eyepiece/ output window; comes standard with ARMS quick release mount. ATN manufactures and distributes the widest array of Night Vision weapon sights in the world. We are a sales and marketing leader in the US. Unsurpassed customer service on both our website and 800#, our technicians are the most knowledgeable in the world. We manufacture for the US military, law enforcement, the FBI and the Department of Homeland Security.