Mostly every Armor I have come across has been an old crusty guy who everyone on the set is a bit intimidated by, me thinks they bullied and disrespected a young girl and her authority. How the AD had unfettered access to the gun is another story of a probably undermanned undiciplinedoverworked crew
Toxic workplace with staff walking off set for numerous negligent discharges. Regardless of all the rest, responsibility for this goes beyond just her.