Anybody may sue anybody else for anything. There are lots of lawyers out there who will take on any kind of personal injury project. Which usually results in an out of court settlement. Regardless of legal precedent.It has already been proven in previous lawsuits that the minute you step on a shooting range you realize that you are around something that is inherently dangerous and therefore the liability for this type of thing would not fall on the owner of the gun since it was brand new.
All that fine print boiler plate that you sign on for at many ranges is to protect the range from liability. Not the gun owner or shooter.