Who makes the Humvee military vehicle?

Answer 1

The vehicle is the design of a company called Hummer, but as with other military equipment, the Humvee is probably produced by several contractors; all much the same. They are all made to military specifications, so any difference would be trivial.

Answer 2

AM General. The civilian company "Hummer" was a subsidiary of AM General, and came about AFTER the military model had been designed.