New Jersey Attorney General Matt Platkin is putting gunmaker Glock on notice. He and 11 other attorneys general are telling the firearm manufacturer to preserve all evidence about how easily their pistols can be converted into machine guns.

Platkin’s letter was sent just days after a lawsuit was filed in Chicago. Law enforcement officials in that city say automatic weapons have become the weapon of choice for criminals. The lawsuit claims Glock knew its guns could be easily adapted with a cheap, small device.

“Turning a pistol into a deadly machine gun should not be as easy as fitting Lego pieces together...” Platkin wrote. “If Chicago's allegations are true, it would be difficult to think of a better example of a company choosing bloody profits over public safety by ignoring more responsible design choices."

The Chicago lawsuit is the first to use Illinois’s new Firearms Industry Responsibility Act, passed and signed into law in 2023 to hold gun companies accountable for conduct that endangers the public.