Analysis of information sources in references of the Wikipedia article "Homemade firearm" in English language version.
The [internal documents from the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF)] acknowledges that the absence of a serial number on PMFs does not render these items untraceable. This acknowledgment directly contradicts the ATF's public position that PMFs are dangerous because the lack of serial numbers makes them untraceable.
A PMF is a firearm, including a frame or receiver, completed, assembled, or otherwise produced by a person other than a licensed manufacturer, and without a serial number placed by a licensed manufacturer at the time the firearm was produced.
{{cite journal}}: CS1 maint: DOI inactive as of July 2025 (link)(3) The term 'firearm' means (A) any weapon (including a starter gun) which will or is designed to or may readily be converted to expel a projectile by the action of an explosive; (B) the frame or receiver of any such weapon; (C) any firearm muffler or firearm silencer; or (D) any destructive device. Such term does not include an antique firearm.
{{cite journal}}: CS1 maint: DOI inactive as of July 2025 (link)The term [firearm] shall include a weapon parts kit that is designed to or may readily be completed, assembled, restored, or otherwise converted to expel a projectile by the action of an explosive.
There is no make, model, or serial number on these firearms. Data systems are not able to track this market in a meaningful, actionable way