MIL-PRF-49166-2 Mechanical Scanner, Mx-9872\(V\)2/UaThis performance specification covers the Mechanical Scanner, MX-9872 \(V\)2/UA and augments MIL-PRF-49166. The MX-9872\(V\)2/UA is used on the AN/TAS-4, Night Vision Sight, Infrared; the AN/TAS-5, Night Tracker; and the AN/TAS-6, Night Observation Device, Long Range.