True, but Rick & co. aren't exactly walking around with old military surplus, the Governor had a freaking full auto Stery Aug, that's hardly a Vietnam take home. There's also the restriction on full autos that's in place, outside of dealers and ranges regular people can't buy full autos made after 1986(?), that's why fully automatic guns are really expensive and hard to come by,
There's gangs running around who have RPGs and .50 cal machine guns. So there must be a large amount of illegal guns in the U.S. that would certainly filter out in a situation like TWD. Not to mention there are gunsmiths who have licenses to build new full auto rifles for military or law enforcement. If you knew where to look you could probably get them. Presuming their former owners and dead and not guarding them. :lol
I may watch a couple more shows, but they're not doing anything to make us like any of these characters so far.