this is a real picture of a .30 cal (i made the version with the bigger barrel).
and here is a link to the video of mine.
http://youtube.com/watch?v=nlVTSS1NkC8
its kinda bad becuase the bipod are gas canisters, and the part where the shells go in is a cinder block, and the barel is some type of heater thingy.













