Earlier quoted context omitted.
And I'd argue that shell casings are probably harder to manufacture than a fully working firearm. The equipment needed to manufacture working ammunition end-to-end is pretty serious.
All of these manufacturing equipment and processes existed more than a century ago. If you have a capable VMC, you can make the die and other equipment necessary to stamp shell casings from commonly-available parts and machinery. From there, with a modern Dillon or Hornady reloading press, you can crank out thousands of rounds per day without issue. Primers are a legitimately difficult thing to manufacture, but (good…
thats a problem that may not endure. if a firearm is reengineered to use an electrode to detonate charge rather than a chemical primer, there is no need for murcury fulminate, just a piezo electric spark generator, and a few square cm of cerebral cortex.