The M129 supply van is a two-axle semitrailer towed by a 5-ton tractor. Each van has 1,943 cu.-ft. of space and is used to transport and store tools and supplies. The U.S. Army, Army Reserves and National Guard currently RESET their M129 vans at Red River Army Depot (RRAD). Heil Trailer Defense provides the van bodies for this effort and is the Army’s sole source for RRAD’s RESET program.