vtunderground -- In the arctic scene, the heads appeared to be SureFire turbos, as the M6 has. I couldn't make out the body, but the way the man was holding it suggested it was a shorter one -- an M3T or M6 and not an M4.
chiphead -- Near the end of the movie (the scene that I think bhds was describing), I saw a small light. But its dark color made me think it looked more like a Streamlight Scorpion than a SF E2e.
Just my guess: I'm not completely absolutely sure about either of these because they were shown for just an instant.
Paul