The company behind the plans, Austin, Texas-based Defense Distributed, had reached a settlement with the federal government in June allowing it to make the plans for the guns available for download on Wednesday.
While a United States federal judge stopped a Texas based website called "Defense Distributed" from formally releasing the blueprints, it turns out some of the plans were posted online to the world anyway.
The White House said Wednesday that the Justice Department did not consult President Donald Trump when officials dropped litigation that would have prevented the posting of instructions on how to make 3D-printed plastic guns, which are illegal to own or assemble.
The gun's components can be made with a printer that uses plastic instead of ink.
The states sought a restraining order and an injunction to block the gun info from being posted on the internet. The available blueprints include guides for making guns akin to assault-style rifles like AR-15s and AR-10s, a pistol called "Liberator" and a Ruger 10/22.
An attorney for Defense Distributors told The Associated Press he doesn't know how many blueprints have been downloaded in the intervening days, but some news outlets say the online manuals have been downloaded thousands of times and posted elsewhere online.
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She also repeated her claim that she was under the influence of alcohol and sedatives at the time she posted the tweet. The tweet implied senior Obama adviser Valerie Jarrett was the offspring of the Muslim Brotherhood and an ape .
In truth, "undetectable plastic guns have been illegal for 30 years, " said Chris W. Cox, executive director of the NRA's political arm. "Already spoke to NRA, doesn't seem to make much sense!" he tweeted. He said that the mass production of these easily-concealed and untraceable guns would create concerns along the border between Canada and the U.S.
Defense Distributed's 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 many USA mass shootings.
Eric Soskin, a lawyer for the US State Department, told the judge on Tuesday that the government's role in the case was that of a bystander.
The owner, Cody Wilson, says his goal is to make every gun design on earth available to anyone online.
"Wilson agrees not to post any new unsafe 3D printable guns until our September hearing", Grewal posted. The technology has quickly grown, too, with 3D blueprints for guns now making all the headlines.
Throughout the day several Democratic lawmakers criticized President Trump and the administration for capitulating to Wilson, despite previous legal victories. "It's certainly a huge global problem, particularly given that many other countries have much stronger gun laws than in America", Lowy said.
The technology of 3D printing and plans would allow people with access to the right machinery and materials to manufacture a working, untraceable firearm in secret.