Elbow telescope M92D is a fixed-focus fixed-reticle-type elbow telescope having 3-power magnification and a field of view of 12 degrees 12 minutes. When the elbow telescope M92D is installed in the telescope mount M90 (T183) which, in turn, is mounted on the rear bracket of the 106-M recoilless rifle M40 (T170E1), it is the direct sight for this weapon.