The preliminary injunction ruling is the first barring a company from selling the accessory the FRT . The device allows a semiautomatic firearm to fire as fast as a machine gun . Rare Breed Triggers LLC and Rare Breed Firearms LLC and their owners Lawrence DeMonico and Kevin Maxwell knew that FRTs made a weapon qualify as machine guns under federal law . The companies are likely to prove that the defendants tried to hide their sale from the Bureau of Alcohol Tobacco Firearms and Explosives by intentionally failing to register the accessories . The judge pointed to allegations that an ATF agent received a threatening phone call from the fax line in the lobby of Maxwells law office . According to the ATF the caller who did not identify himself said When are you going to stop trampling on our Second Amendment rights. The judge wrote that the call was a troubling coincidence because the ATF had served Maxwell with a ceaseanddesist letter one month earlier but noted that the government has not proven that he had not been involved in the call . The ruling stops Rare BreedTriggers and its owners from selling FRT and other machine gun conversion devices until otherwise ordered and requires the defendants to preserve all documents related to the manufacture possession receipt transfer customer base andor historical or current sale of conversion devices . has reached out to attorneys for the defendants have reached out for comment . The defendants have declined to comment. The ruling. has not been commented. has declined to provide an explanation. for comment. for an explanation to the defendants. The defendants. to provide a comment. An attorney for an answer. for any information. An explanation. An answer. An apology. An appeal. An apparent error. An additional explanation. in an apparent error in this article. An alleged error.