After looking through the files, I've concluded that the game won't accept more than one controller type per object. I've done things like adding another controller to a weapon with a secondary function and it won't take. Only one of the controllers are accepted at a time.
I imagine this can be done, but when trying the most simple possibilities, I'm guessing it's more work than it's worth. You're probably better off manning the gun yourself.
May I ask why you want this anyway?
|