Trump tweeted Tuesday he is "looking into 3-D Plastic Guns being sold to the public", adding that he "already spoke to NRA". He did not offer further details.
Joining were attorneys general from California, Connecticut, Maryland, Massachusetts, New Jersey, New York, Oregon and Pennsylvania.
The states behind the lawsuit argue that publishing blueprints would allow criminals easy access to weapons.
"Defense Distributed's mission, & the federal gov't abdication of their responsibilities, forces my hand into fighting an obscene proposition", said Pennsylvania Attorney General Josh Shapiro, like Grewal and Feuer a Democrat. "These downloadable guns are unregistered and very hard to detect, even with metal detectors, and will be available to anyone regardless of age, mental health or criminal history".
On Sunday, July 29, 2018, Defense Distributed and the Second Amendment Foundation, a gun rights organization, sued Attorney General Grewal in federal district court in Austin, Texas, seeking to prevent Attorney General Grewal from preventing the publication of the company's computer files on its website, known as "DEFCAD".
"This isn't a gun case", said Blackman, who challenged Pennsylvania's efforts to block the downloads.More news: Cubs affected most from the Cole Hamels trade
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They said they'll be discussing the dangers of the 3D printed guns and the legislation to address it.
But gun industry experts have expressed doubt that criminals would go to the trouble, since the printers needed to make the guns are very expensive, the guns themselves tend to disintegrate quickly and traditional firearms are easy to come by. "It's a violation of the First Amendment, it's unconscionable and we're going to fight it to the very end".
The State Department changed its opinion in late June, and agreed to allow Wilson to resume posting the blueprints. The largely plastic guns would be invisible to background checks and untraceable by law enforcement.
But, months later, in an apparent change in tune, the Trump administration chose to remove the "technical data" for the 3-D gun blueprints from its list of USA munitions as part of the June settlement agreement with Defense Distributed, meaning it was free to go forward.
Defense Distributed, which offers a variety of 3D products related to firearms, will launch their DEFCAD project on August 1.
The founder of the Texas-based company first published designs for a 3D-printed gun in 2013, which was subsequently printed approximately 100,000 times until he was ordered to stop by the State Department. The company said it has also blocked access to users in New Jersey and Los Angeles.
In 2015, Lisa V. Aguirre, who was the director of the Office of Defense Trade Controls Management within the State Department, warned the federal court in a 70-page declaration that Defense Distributed's downloadable gun-making schematics would deny the department any opportunity to determine whether the uploaded blueprints would "cause significant harm to the national security or foreign policy interests of the United States", considerations ITAR required.