The kids are right, but their father was largely at fault.
HE placed the UZI in the girl’s hands.
Who was supervising the shooting session? Was the guy who shot the expert who should have been watching the whole scene?
That is my understanding. If *HE* is the one who handed that gun to the little girl, tragic though it is, it is pretty much his fault.
It would not matter on whose premises he did such a thing, so therefore I do not see how the owners of the range can possibly be held responsible.
If however someone else, and especially someone connected with the range, did it, then the owners may very well have some liability.
Was the instructor consulted about the action? or did the father act without the consent of the instructor?
Still the instructor’s fault, as he was responsible for who did what with the weapon. He should have been close & aware enough to intervene as the father handed the weapon over to the child; not like it was a sudden accident or unstoppable act.