[Ayoob] Wali told investigators that he found the [GLOCK] switches in a car he bought, but eventually admitted that he was getting them from a man named “Xavier,” who was identified later as [Xavier Desean] Watson.
An undercover ATF agent then contacted Watson and arranged to purchase 33 conversion device and a 3D-printed AR-15 style rifle. Watson bragged to the agent that he could produce about 400 switches per day on the two 3D printers he had set up in his apartment.
