Aloha all!
i've always kind of wondered about this. There are no shortage of tiny indie films featuring guns. I know this crowd, and I know the budgets involved, and I don't believe they're buying realistic props. I believe they're using actual firearms. Which, ok, with accommodation for state laws (handgun owner on set, for example) and safety training, why not?
Now I find myself running sound in one of those films. I volunteered to conduct some basic training, even to take members of the cast shooting, if anyone was unfamiliar with firearms. So far, so good.
They've put out a call in the community, looking to borrow guns for the film. Aha! Belief confirmed! They're looking for a couple of Glocks, a matched set of rifles (which aren't specified, but should be contemporary military-style), a couple of grenades, and some affiliated tac gear.
Here we finally come to the question: how comfortable would you be letting someone use your guns to make a film? What would be your requirements, were you to agree?