"There is a possibility of irreparable harm because of the way these guns can be made", he said.
Gidley notes that it's now illegal to own or make a wholly plastic gun, including any made with a 3D printer, and says the administration supports that law and "will continue to look at all options available to us to do what is necessary to protect Americans while also supporting the First and Second amendments".
The settlement would have allowed Defense Distributed to legally post blueprints online detailing how to print guns in 3D.
Meanwhile, Defense Distributed agreed to block temporarily Pennsylvania residents from downloading the plans after state officials went to federal court in Philadelphia on Sunday (Monday NZT) seeking an emergency order.
Josh Blackman, a lawyer for the company Defense Distributed, said during Tuesday's hearing that blueprints had already been uploaded to the firm's website on Friday. It's unclear how many downloads have already occurred, but the Internet being what it is, one download was probably enough for the plans to get to everyone who wants them.More news: Key players in US case versus ex-Trump campaign chairman Manafort
The Trump administration had previously given the go-ahead for the online publication of the plans, which show how to make a firearm from printable parts.
BOB FERGUSON: Makes no damn sense - no damn sense at all - to make those available.
The US Supreme Court declined to take up his case. Advocates say the files are protected by the First and Second Amendments in the U.S. Constitution.
The state department has said it made a decision to settle the case on the advice of the justice department, which argued the government would lose this case as it was about the First Amendment of the Constitution, which guarantees the freedom of speech.More news: Iran’s elite guards shoot down Trump’s meeting offer
U.S. District Judge Robert Lasnik said the untraceable weapons - which bear no serial numbers and can be printed from directions downloaded from the Internet - could end up in the wrong hands, The Associated Press reported. Those plans were put on hold by the Seattle judge's decision.
Markey, Blumenthal and other Democrats filed legislation that would prohibit the publication of a digital file online that allows a 3D printer to manufacture a firearm.
The White House is declining to say whether the president thinks blueprints for printing plastic guns should be available to the public. 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.More news: States Move to Stop Website From Posting 3D-Printed Gun Files