A gun rights group that has posted blueprints to make guns with 3D printing technology blocked downloads from its website Tuesday after a federal judge sided with states that argued the postings could help criminals and terrorists manufacture such weapons.
Judge Robert Lasnik's ruling didn't order the plans to be taken down but temporarily blocked a settlement that Defense Distributed, a Texas-based gun rights organization, and the federal government reached in June that made it legal to post 3D-printable gun plans online.
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"This is a nationwide ban. ... It takes us back to a period of time before the federal government flipped on their policy regarding these 3D ghost guns," Washington state Attorney General Bob Ferguson said on "Anderson Cooper 360˚"
"What it means is if anyone posts this information online, they are in violation of federal law and can suffer very serious consequences. So, it makes it unlawful to post that information and make it available to the public."
Defense Distributed founder Cody Wilson said the site has disabled downloads until he reviews the order.
Later he tweeted: "By order of a federal judge in the Western District of Washington, http://DEFCAD.com is going dark."
The website had touted that plans for several plastic weapons would be available Wednesday to people who had signed up for a login. Some plans had already been available for download.
The settlement with the federal government had ended a multiyear legal battle that started when Wilson posted designs for a 3D-printed handgun he called the Liberator in 2013. The single-shot pistol was made almost entirely out of ABS plastic -- the same material Lego blocks are made from -- and could be made on a 3D printer.
The Liberator would contain a 6-ounce piece of steel that can be removed, raising the possibility that walk-through metal detectors would not detect the guns, Ferguson and other states' attorneys general alleged in the lawsuit before Lasnik.
Gun control advocates have warned that such weapons would be made without serial numbers and be largely untraceable by law enforcement. Proliferation of 3D printing plans also would make it easier for people who cannot pass criminal background checks to access guns, they say.
The high-end 3D printers needed to make such weapons cost thousands of dollars and may be too expensive for most people. But that doesn't ease the concerns of those who think 3D-printed guns are a bad idea.
In 2013, the US government made Defense Distributed take the blueprints down, saying they would violate International Traffic in Arms Regulations, potentially allowing someone in a country to which the US doesn't sell weapons to download the plans to make their own guns. Wilson sued the federal government in 2015, and the Trump administration settled the case in June.
But Lasnik found the government didn't follow procedure when agreeing to the settlement.
"Plaintiffs have shown a likelihood of success on the merits of their Administrative Procedure Act claim," the judge wrote.
CNN reached out to Josh Blackman, an attorney for Defense Distributed, for comment.
The litigants will return to court on August 10 to discuss whether a preliminary injunction is needed.
Ferguson announced Monday he was leading the lawsuit, which originally involved eight states and the District of Columbia. The petition for the temporary restraining order was filed in federal court in Seattle. Iowa and Virginia joined the case on Tuesday.
Alan Gottlieb, a founder and vice president of the Second Amendment Foundation, told CNN's "Cuomo Prime Time" that it was a matter of applying the First Amendment to protect citizens' Second Amendment rights. He said some communities are losing access to firearms sellers because of local laws.
"If you're allowed to own a firearm in your own home," he said, "you should be able to make the firearm in your own home if you can't buy one locally because of crazy restrictions."
New York: Release of plans is 'reckless'
New York Gov. Andrew Cuomo also announced a series of actions Tuesday to prevent the distribution of the 3D-printable gun designs. Cuomo issued a cease-and-desist letter to Defense Distributed to block the distribution of designs for 3D-printed guns in New York. The governor called the impending release "reckless."
Cuomo directed state police to issue a notice reminding New Yorkers that manufacturing firearms defined as assault weapons is illegal in New York.
"As the nation rises up and calls for action against gun violence, it is absurd and frightening that the federal government wants to make accessing an automatic weapon as easy as hitting print," he said. "New York is proud to have the strongest gun safety laws in the nation, and we won't let this federal government take us backwards."
Cuomo said he will pursue legislation to bolster the state's gun safety laws and outlaw private production of all 3D-printed and "ghost guns" that are untraceable and invisible to metal detectors.
Cuomo's actions came after Pennsylvania went to court Sunday to block early distribution of the plans, which weren't supposed to be available for download until Wednesday. But more than 1,000 designs were downloaded recently in advance of the agreed-upon August 1 date.
At the hearing, Defense Distributed agreed to block Pennsylvania IP addresses for a few days until a more formal hearing could be held.
Blackman, the Defense Distributed lawyer, told CNN on Monday the Pennsylvania case was about free speech rights, not the manufacture of guns.
"One state cannot censor the speech of a citizen in another state," he said.
'We know this fight is not yet over'
The National Rifle Association said Tuesday that undetectable guns already are illegal.
"Many antigun politicians and members of the media have wrongly claimed that 3D-printing technology will allow for the production and widespread proliferation of undetectable plastic firearms," said Chris Cox, the NRA's executive director for legislative action.
"Regardless of what a person may be able to publish on the internet, undetectable plastic guns have been illegal for 30 years. Federal law passed in 1988, crafted with the NRA's support, makes it unlawful to manufacture, import, sell, ship, deliver, possess, transfer or receive an undetectable firearm."
Cox was referring to the Undetectable Firearms Act of 1988.
The statement came after President Donald Trump expressed skepticism over the ability to download plans for 3D-printed guns legally, saying in a tweet that he's spoken with the NRA about them because the technology "doesn't seem to make much sense!"
The Brady Campaign to Prevent Gun Violence applauded the decision temporarily blocking the 3D-printed guns.
"It is immediately obvious to anyone who looks at this issue that 3D-printed guns are nothing short of a menace to society, and we are thrilled that the court ruled in this manner," Avery Gardiner, co-president of the Brady Campaign, said in a statement.
"The efforts of these attorneys general throughout the nation have helped strike a powerful blow against the scourge of 3D-printed guns, but we know this fight is not yet over. We will continue to do everything in our power to make sure that this temporary halt in publication becomes a permanent one."
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