Quote Quoting number8 (view post)
Correct. Green band trailers are approved by the MPAA, and they have two rules about guns: they can't be pointed at the audience, and you can't have a shot where people are pointing guns at each other.
This is news to me. I seem to recall tons of trailers where two people have guns pointed at each other but the more I think about it, the more it was probably all assumed off camera or cut like in the trailer above.