The XM706E2, was supplied to the U.S. Air Force forbase protection purposes, post-attack reconnaissance against munitions and EODuse. The XM706E2 featured no turret and an open-toppedcenter parapet. In practice a variety of weapons were mounted on USAF XM706E2s,but the most common configuration was one .50 BMG-caliber M2HB machine gun andone 7.62mm NATO M60 machine gun. Other equipment included the XM174 40 mmgrenade launcher and searchlights. The 3rd Security Police Group of the UnitedStates Air Force at Clark Air Base Republic of the Philippines was stilloperating the Duck" as a Fire-Team vehicle until it received M1026HMMWVs in the fall of 1988.