There are many firearms (i.e. receivers) that do not even require CNC machinery. A manually operated milling machine is more than enough. A small charcoal-fired

There are many firearms (i.e. receivers) that do not even require CNC machinery. A manually operated milling machine is more than enough. A small charcoal-fired furnace and drill press is enough to make an aluminum cast AR-15 or 1911. No need for the furnace if you're making stamped AK variant receivers. There are many places in the world where you see these sorts of garage workshops. I always wonder whether the anti-gun public is aware of the ease in which people are and will be able to acquire firearms "extra-legally" in the event of outright prohibition or further restrictions. I assume not, but I prefer not to enlighten them lest they attempt to make aluminum cans and hand files illegal as well.