You can't model that good it is stolen
Acctually, the only sighted weapon I've seen, was HellsHeros one.But the script was complicated as stuff.
You got it from someone from google sketchup
HellsHero's isn't really that complicated. If you can leasrn to understand it. You can then see where that part is. But I Tried it on my T811AR. Only problem is, I think you need a certain joint to make it work. Other than that, I'm not sure.