Yes it's a foldable, originally came with the Hummer Sports vehicle - and the army made use of them for paratroopers.

http://www.montagueco.com/aboutusourhistory.html

I won this one, believe it or not --- from a Newport cigarette contest (mom smoked) - so I submitted mine and Mom's name and forgot about it. Probably 6-8 months later I get this large box delivered to my porch --- addressed to Mom . Wasn't going to keep it - but I started riding more in the winter - and doing more offroad - so I kept it. Going to keep using it as my commuter bike - and going for a more compact/lighter weight mtb in the Spring.

Not to mention how many people have noticed it's a one of a kind bike around here too ...