DIY gun-smithing is illegal [arstechnica.com]?
A Sacramento, California man was sentenced [justice.gov] Thursday to over three years in prison for unlawful manufacture of a firearm and one count of dealing firearms.
Last year, Daniel Crownshield, pleaded guilty [arstechnica.com] to those counts in exchange for federal prosecutors dropping other charges. According to investigators, Crowninshield, known online as "Dr. Death," would sell unfinished AR-15 lower receivers, which customers would then pay for him to transform into fully machined lower receivers using a computer numerically controlled (CNC) mill. (In October 2014, Cody Wilson, of Austin, Texas, who has pioneered 3D-printed guns, began selling a CNC mill called "Ghost Gunner, [arstechnica.com]" designed to work specifically on the AR-15 lower.)
"In order to create the pretext that the individual in such a scenario was building his or her own firearm, the skilled machinist would often have the individual press a button or put his or her hands on a piece of machinery so that the individual could claim that the individual, rather than the machinist, made the firearm," the government claimed [documentcloud.org] in its April 14 plea agreement.
So, if he taught a class in how to do it would he also then be a criminal?