An activist who garnered national attention for running a Texas company that sells blueprints for making untraceable 3D-printed guns has resigned from the firm he founded after being arrested on charges of having sex with an underage girl.

Authorities say Wilson had sex with an underage girl who he met the girl through the website SugarDaddyMeet.com.

The owner of a Texas company that makes untraceable 3D-printed guns said Tuesday that he has begun selling the blueprints through his website to anyone who wants to make one, despite a federal court order barring him from posting the plans online.

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.

"There are 3D printers in public colleges and public spaces and there is the likelihood of potential irreparable harm," said a Seattle judge.

The U.S. State Department had previously banned the blueprints as a national security risk and a violation of arms trafficking regulations.

Gun-control advocates are sounding alarms on "ghost guns," which will be unregistered and will not come with a serial number.

Among the chief concerns from law enforcement and law makers has been that a 3-D printed gun, made of plastic or other materials, could be easily slipped through metal detector at a courthouse or other such facilities.

The technology has recently advanced to create handguns made entirely out of plastic that are capable of shooting several shots before faltering.