this is how accidents happen!!!! prop gun or not, it doesn't matter, she really needs to be taught how to correctly handle firearms!!!!
maybe the armourer and firearms safety officer were too distracted by the see-thru shirt but if she was on my production set she would have been disarmed and removed from set immediately until she had been through another firearms training course! I did it to Angelina Jolie and I would do it to her!( everything was live firing with blanks on that set, and the director and producer were livid with me but when the safety certificate for the production was pulled they soon backed down!