Zealot

so I was stumbling around tor head today and I noticed that on some of the weapons had a 3d model that could be viewed. I know I have heard people pulling 3d models from games and such and being able to use those as a basis of their models. my question is would there be away to pull 3d models from that place to use to make the models. im sure it is well over my head, but if it is possible I would love to learn how to do it to set a goal for the future, if anyone knows how to do it.
link -> http://www.torhead.com/item/dPSHBQY/troopers-birthright-autocannon