Manufactured between May 1943 through May 1945 by International Harvester, the M5 HST was designed to tow artillery guns and other heavy weapons in addition to their ammunition.
M5 HST:- Original wartime production model.
M5A1:- Revised version featuring enclosed cab modelled on the M4 HST.
M5A2:- M5 with upgraded suspension.
M5A3:- M5A1 with upgraded suspension.
M5A4:- M5A2 with postwar storage bin upgrades.