"'Every film/TV set that uses guns, fake or otherwise, should have a police officer on set, hired by the production, to specifically monitor weapons safety,' the Rust star and producer tweeted from her account, which is now private. She also shared a screenshot of the tweet on her Instagram page."
It would have been smarter and more realistic if she had specified "local gun store owner" or "certified NRA instructor," in my opinion. Far more experience with a diversity of firearms, I would expect. But, that's Hollywoodland, where reality does not exist.