Ordnance provision system. [Ordnance catalog (ordnance provision system): [Group F1, Telescope, panoramic, M2, M2A1, M3, M3A1, M4, M5, M5A2, M5A3, M5A4, M5A5, M5A6, M6, M1917M1, addendum, Changes 1; Jan. 27, 1943.