The Torts Prof blog is reporting that witnesses to the mass shooting in Las Vegas have filed a would-be class action lawsuit against manufacturers of bump stocks, the device used by shooter Stephen Paddock to accelerate gunfire from his semi-automatic weapon. Causes of action include negligence, infliction of emotional distress, products liability, and public nuisance. The ABA Journal has more details.
Unfortunately, given the state of the law, the lawsuit is not likely to be successful. Again, The ABA Journal has more information here.