I suppose I was looking away when this part of the film passed by, but when Janet has to face the payout master with her gun, the gun is loaded with blanks. She obviously carries the gun with her at all times, so I wonder how the casino management got her gun in order to load it with blanks. There's actually an earlier sequence in which a casino staff member is shown sneaking the gun out of her purse and cutting the bullets open to remove the live parts, which turns them into blanks, so she ends up with a gun that's harmless but she doesn't know that.