Cybot Galactica's M-3PO military protocol droid were produced with a black-hued version of the standard 3PO-serieshumanoid body. Their sensor-filled, clamshell-shaped heads were appropriated from the discontinued KW traffic control droid.
Despite their "military" designation, M-3PO units were not designed as battle droids. Rather, they were administrative organizers, programmed with the rules and regulations of over six million military and paramilitary organizations. M-3POs specialized in equipment requisitioning, barracks billeting, duty roster planning and personnel file management. These units were notoriously thorough, and insisted on maintaining procedure through the "proper channels".