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The AN/PVS-22 or Universal Night Sight is a Picatinny rail mounted in-line night sight designed and manufactured by FLIR Systems and Knight Armament Company and issued with the existing telescopic sight or red dot sight. It can be added to any weapon that uses a Picatinny rail and has an existing scope, simply mounting in front of the existing scope to grant it night vision capability. It utilizes a third generation image intensifier tube, which is not available outside of the USA.