Ordnance provision system. [Ordnance catalog (ordnance provision system): Groups A-T. F-237. Table, firing, graphical, M2, M3, M4, M5, M6, M7, M8, M9, M10, M12, M13, M14, M15, M16, M17, M18, M19, M20, and M22, list of all parts; Sept. 8, 1943.