It is neither... a Ford M151 mutt. Jeep replacement from the 1960s. Set up as it would have been c. Grenada. Right before the Hummers came along and replaced it.
They are still a bargain... Mutt cost less than the M2... in fact less than a good tripod! Though I had to build all the mount find pintle, fit radios, etc. it is wicked fun to drive!
Cheers, Sirhr