ARMY FM 4-20.117 (FM 10-517) AIR FORCE TO 13C7-1-111 Airdrop of Supplies and Equipment: Rigging High-Mobility Multipurpose Wheeled Vehicles 22 July 2005 The manual tells and shows how to rig HMMWV-series trucks in the Army inventory at the time of publication for low-velocity parachute airdrop. Some specialized truck configurations and loads are included.