This is a puppet-scale Hummer H2 body used in Team America. This is the one that was used when you see the guns come out of the headlights and the rocket engines pop out of the back. This body actually does these movements (by pulling steel cables hanging underneath it), then they cut to a different Hummer body that had the parts fixed in the 'open' position. This thing is over 5 feet long.

Here's an angled shot with the guns and engines out:

Front of Hummer with the gun retracted. There should be little fake
headlights on the front. I have one, but it fell off...:

And extended:

Rear of Hummer with the Engines retracted
Normally the back 'window' is covered with a blue and stars cover.:

And extended:

And a close-up of the engine detail:

Screen shots from the movie: