A company that has deployed 3D printer designs for guns amounted to a prohibition of sharing them online with the sale of flash drive that contains the file.
The designs were available for free download, but a temporary ban has been imposed by a judge concerned that they could fall into the wrong hands.
Defense Distributed now promises to deliver the units to customers were selected.
Its price is $10 (£7.70), but customers can choose how much to pay.
The story of what the Texas-based firm’s founder Cody Wilson calls the “downloadable gun” has been a chess.
Computer-aided design (Cad) were originally published online in 2013. But the website was quickly ordered to remove the files for fear that they could be used by terrorists or criminals to make untraceable “ghost guns”.
In a surprise move, and after a long judicial action by Defense Distributed, the Department of Justice has established the month of July, and that the models do not represent a threat to national security and could be put back in line.
They were downloaded thousands of times, prompting complaints from 19 states in the united states. Led by the state of Washington, have launched a legal action against the government of the UNITED states.
That, in turn, has led to a federal judge to issue a temporary ban that has seen the file, once again removed from the internet.
Now it is online again, the files are only available for purchase and delivery to customers with headquarters in states that have not imposed a prohibition.
Those who live elsewhere it is said: “Your teachers say that you can not be trusted with this information.”
Users can also send their files to sell on the platform and will be able to get a 50% cut.
In a press conference, Mr. Wilson said that his company had already received 400 orders.
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“I am happy to become the iTunes of 3D guns if I can’t be the Napster”, the news site Ars Technica reported him as saying.
Napster was a file-sharing music service, which offered Mp3 for free.
“Anyone who wants to get these files is to get. They can name their price,” Mr Wilson added.
He said that his move was motivated by a desire to support the freedom of speech, rather than to make money.
The main Defense Distributed website still carries a statement saying that he had received the order to shut down its file repository.
Defense Distributed files cover a wide range of firearms, including 3D-printable components that might make a version of the AR-15 semi-automatic assault rifle, a gun that was used in the UNITED states mass shootings.