You're right. The main function of gunsmithing is modification, maintenance and repair. That being said, what happens when we revert back to cowboy days? Sent from my MexiPhone5000
i just people will make do with the guns that have already been produced or the very few people who have knowledge on gunsmithing will do well for themselves.
if you're worried about that why not build a cache of unregistered guns that you hide somewhere so when and if they took the ones they know about you will still have back up somewhere....maybe buried in your yard somewhere.