Weapon model files?

I was just curious if it is possible to get the in game files for the weapons in the game?
I'm specifically looking for Moxxxi's good touch and bad touch.

I'm also wondering what sort of program would be required to open the files, view them and potentially modify them?

This is for a project I'm attempting for my class. I'm not learning as much as I want to so I'm attempting something a little different.