Long Term Rifle Decisions

[Legbreaker]

This is true, however they've been doing it for years while the rest of the world generally don't have the knowledge or the tools.
I think (and could well be wrong) that the barrel is likely the hardest part to fabricate, specifically the rifling. Smoothbores such as shotguns should be relatively simple affairs and likely to make a bit of a comeback in the decade after the war.

Long term though (over a decade) anything is possible and really depends on how much the region in question has recovered. My guess is that from about 2010-2015 whole new designs will see the light of day, completely different to what we are seeing now IRL. Generally they're likely to be a lot simpler and use materials more in common to mid 20th century designs. Aluminium for example requires a LOT of energy to work (electricity specifically) so it is unlikely to be seen in early 21st century designs.