Quote: "I'm not starting a competition or anything. I'm just saying that you should start over with that model (re model it) with less divisions and with a thought to poly count you'll get it under 600 easily.
Don't take it as an angry comment."
Of course polygon count is irrelevant, it's the number of triangles in the object that actually matter. Also, 600 polies seems far too low to keep any of the geometry in the original gun. In fact, for making a statement like that, I challenge you to actually produce a similar model in under 600 polies. Keep the barrels and body similar (certain things could be done with a texture), you don't have to hollow out the smaller barrels (should be a texture), and you can do what you wish with the tripod legs.