The court case followed a settlement between Defense Distributed and the U.S. State Department that allowed the files to be posted.
Cody Wilson - the founder of Defense Distributed and the person who introduced the world to 3D-printed guns - and his supporters say the ability to build unregulated and untraceable guns will make it much harder, if not impossible, for governments to ban them.
The NRA said in a statement that "anti-gun politicians" and some members of the news media wrongly claim that 3D printing technology "will allow for the production and widespread proliferation of undetectable plastic firearms".
Republican leaders say existing laws on the books already outlaw the private manufacturing of guns and undetectable firearms, and require any firearm made to contain metal.More news: Jose Mourinho sent message by Andreas Pereira ahead of new season
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"The State Department wants to prevent the wrong people from acquiring weapons overseas", she said, adding that the Justice Department recommended that the government settle the case "based on First Amendment grounds" allowing publication of the detailed plans.
Throughout the day several Democratic lawmakers criticized President Trump and the administration for capitulating to Wilson, despite previous legal victories. At least one of the guns can also be made from plastic, which is virtually invisible to metal detectors. Mr. DeLuz said the site was shut down after Amazon Web Services sent a message saying the content wasn't in compliance with the temporary restraining order. "Already spoke to the NRA, doesn't seem to make much sense!" the president tweeted.
Hours before the restraining order was issued, Democrats sounded the alarm, warning about "ghost guns" that can avoid detection and pose a deadly hazard. Cuomo issued a cease-and-desist letter to Defense Distributed to block the distribution of designs for 3D guns in NY.
While the blueprints for DIY firearms are now legal, federal law prohibits guns that don't contain enough metal to trigger screening machines commonly found in airports, courthouses and other secure areas.
A 1988 federal law - drafted with NRA support - barred the manufacture, sale or possession of an undetectable firearm.
Wilson said in an online video that the blueprints were downloaded more than 400,000 times before they were taken down in 2013. "Making a gun with a 3D printer is kind of like using a screw driver to hammer a nail in- like you can probably get the job done but it's not going to work very well and you might injure yourself", Dukes added.