FMTV - Family of Medium Tactical Vehicles
Version overview
M1078 - flatbed, standard wheelbase, 4x4
M1079 - box body, standard wheelbase, 4x4
M1080 - box body chassis, standard wheelbase, 4x4
M1081 - flatbed, standard wheelbase, 4x4, modified for dropping from aircraft
M1083 - flatbed, standard wheelbase, 6x6
M1084 - hydraulic boom truck, standard wheelbase, 6x6
M1085 - roller, longer wheelbase (XL), 6x6
M1086 - hydraulic boom truck, larger wheelbase (XL), 6x6
M1087 - box body (folding), larger wheelbase, 6x6
M1088 - tractor, standard wheelbase, 6x6
M1089 - recovery vehicle,
M1090 - dump truck, standard wheelbase, 6x6
M1091 - tanker truck
M1093 - truck, standard wheelbase, 6x6, modified for dropping from aircraft
M1094 - dump truck, standard wheelbase, 6x6, modified for dropping from aircraft
????? - ISO 1C container transport vehicle (TEU)
M142 HIMARS - rocket launcher
The vehicles have either a standard cab or an armoured cab, providing protection against mines, explosive booby traps and small arms fire.
FMTV-T - Family of Medium Tactical Vehicles Trailer
Version Overview
M1082 - flatbed, 1 axle
M1095 - flatbed, 2 axles
Sources: https://www.oshkoshdefense.com/ ; https://www.globalsecurity.org/ ; https://www.wikipedia.org/