The Nicholas Cage movie is about how a man becomes an arms dealer. This makes it appropriate that the director of the film was involved in a little arms dealing to make the movie.
Because of his small budget, he decided he couldn't afford to make 3,000 prop guns to shoot his film. So he went to the Czech Republic and bought 3000 Kalashnikov automatic rifles for filming. Not only that, at the end of the shoot, he sold them for a loss. He meant to destroy them but couldn't afford to either.