A U.S. federal judge on Monday extended a ban on the online distribution of 3D-printed gun blueprints, a win for a group of mainly Democratic-led states that said such a publication would violate their right to regulate firearms, as well as endangering their residents.

U.S. District Judge Robert Lasnik in Seattle issued the extension of a nationwide injunction, blocking a Texas-based group from disseminating files for printing plastic weapons on the internet.

Lasnik's prior order, issued on July 31, blocked the release of the blueprints hours before they were set to hit the internet. That ban was due to expire Tuesday and the new one will remain in place until the case is resolved.

Monday's decision blocks a settlement between the Trump administration and Defense Distributed, a group that argues access to the online blueprints is guaranteed under the U.S. Constitution's First and Second Amendments, which protect free speech and the right to bear arms, respectively.

A group of 19 U.S. states and the District of Columbia sued the U.S. government in July, arguing that publishing the blueprints would allow criminals easy access to weapons. They also said the Trump administration had failed to explain why it settled the case.

Lasnik said the states have submitted sufficient evidence that they are likely to suffer "irreparable harm" if the blueprints are published. The judge also said Defense Distributed's First Amendment concerns were "dwarfed" by the states' safety considerations.

Gun control proponents are concerned the weapons made from 3D printers will be untraceable, undetectable "ghost" firearms that pose a threat to global security. Some gun rights groups say the technology is expensive, the guns are unreliable and the threat is overblown. They also say undetectable guns wholly made of plastic are illegal in the United States.

'Intentional insult'

Although Defense Distributed originally had said it would put the files on the internet on Aug. 1, it did so a few days before Lasnik issued the initial temporary ban. The blueprints continue to be available on several other websites.

The files include 3D-printable blueprints for components that would go into the making of a version of the AR-15 semi-automatic assault rifle, a weapon that has been used in U.S. mass shootings.

Defense Distributed founder Cody Wilson called Lasnik's decision an "intentional insult." "The order is a manifest injustice and literally admits to being an abridgment of the freedom of speech," Wilson said in a statement.

A lawyer for the group said it is currently reviewing the judge's decision and considering all options.

Washington State Attorney General Bob Ferguson, who led the states' lawsuit, said in a statement that he was glad about the decision, but criticized the federal government.

"Why is the Trump administration working so hard to allow these untraceable, undetectable 3D-printed guns to be available to domestic abusers, felons and terrorists?" Ferguson said.

Government position

The U.S. State Department, which had previously banned the blueprints as a national security risk and a violation of arms trafficking regulations, also did not immediately respond to a request for comment.

As recently as April, the government in court filings argued downloadable guns would allow extremist groups and criminals abroad unfettered access to arms.

But a lawyer for the State Department said in a court hearing last month that the government had determined in May that the types of guns featured in Defense Distributed's blueprints did not pose a national security risk as they can be bought "in any store."

Lasnik on Monday said the government had failed to comply with procedural rules that mandate a 30-day notice period to the U.S. Congress before allowing the files' dissemination.

"Forcing the federal defendants to evaluate the effect of the proposed delisting on world peace, national security, and the foreign policy of the United States ... may also prompt a reconsideration of the decision," Lasnik said.