Most of us don't have tooling lathes so we buy these things on John Galt’s market.
There are plenty of 21st century "Liberator"-type handguns (and long guns, as well) hiding in the pages of an average industrial supply catalog - no complicated tooling necessarily required...
;^)
33 posted on 06/27/2021 10:13:56 AM PDT by Who is John Galt?
("He therefore who may resist, must be allowed to strike." - John Locke)