Judge Jack Weinstein lets New York City's suit against the gun industry go forward

Brooklyn Federal Judge Jack Weinstein lets New York City's suit against the gun industry go forward. That Weinstein found this is hardly surprising. There is an exception for these suits if the gun companies have violated state or federal law in selling the guns, but I can't seem to find exactly what law they are said to have violated. As far as I can tell, simply claiming that gun makers have "dumped" guns on the market so that criminals will eventually get them doesn't qualify.