As Nevada lawmakers heard public comment last year on a bill to ban ghost guns and the parts used to make them, a resident of the rural town of Dayton called into the hearing to offer his opinion. The privately made firearms are virtually untraceable because they lack a serial number and can be easily purchased online and assembled by people who otherwise wouldn’t be able to legally buy a gun.

“I do not care if this bill passes or not,” said the man, who identified himself only as Loran Kelley. “I am just informing you that we, as Americans, just will not comply with it no matter what you do.”

What he didn’t mention to the committee is that he owns a company called Polymer80, one of the country’s most prolific manufacturers of ghost gun kits and parts. His vow to defy such regulations is as much about principle as profit, even as thousands of untraceable guns bearing the P80 stamp […]