I mean no disrespect when I offer some alternative views. After all, shooters are as opinionated as Trads and Trad shooters even more so, eh?
It is difficult to fault the AK systems per se, but it is not the system or cartridge of the occupying power, so will be, in the event (a near certainty) of "trouble," resupply will be a problem. You will depend on what you have or can barter from others who probably would prefer to keep what they have. The AK systems have been overly faulted for poor accuracy, but that is a reflection of poor ammo quality and iron sights. Quality ammo ($$) and quality optics ($$) find the AK approaching, but not exceeding, the accuracy of the AR/M16 platform. That said, gas systems (most, but not all, AR/M16s) will generally outperform piston (AK) systems. Of course, bolt systems will outperform any semi-/full system, but followup shots may mean survival. Semi-/full systems overtake bolt guns in that respect.
Another point, on SOFT targets out to 100-150 meters (depending on barrel length) the terminal ballistics of the 5.56 NATO ball equal the 7.62 NATO ball and exceeds 7.62x39 ball. As 5.56 NATO velocities drop to subsonic levels (dropping sooner, of course, in short barreled rifles; losing ~50fps per inch of barrel shortening), terminal projectile fragmentation is lost, yaw and tumble persist, and the 7.62 NATO then far exceeds in terminal performance against SOFT and HARD targets beyond 100-150 meters. One may purchase expensive soft points and TAP ammo and the like and quibble over those results, but most folks are stocking up on milspec ball. On HARDENED targets (cover, armor, vehicles), 7.62 NATO outperforms 7.62x39 which, in turn, outperforms 5.56 NATO. You can always up the ante with .50BMG and 20mm Lahti and a GAU-8. :-)
Bottom line: define the mission of the weapon and your budget. No weapon fills all missions well. There is always something out of your price range, e.g.,
http://www.nightvisionplanet.com/flir-thermosight-t60-640x480-thermal-weapon-sight.html CQB? short barreled AR platform in 6.8mm SPC ($$$ and in very short supply) or 5.56 NATO ($) with a Trijicon RMR
sniping? scoped 7.62 NATO bolt or SR25
really long range or really hardened? .338 Lapua or BIGGER!
Reloading? Primers! Primers do not store as well as lacquered or other milspec rounds. I can't fault anyone who wants to reload, but I found the cost savings negligible compared to surplus milspec. I remember spending 2 weeks of evenings in the early 90's when I was a competitor to load a couple thousand rounds of 5.56 NATO—saved all of $30-$40 over
http://www.ammoman.com. I gave away all my reloading equipment and have never regretted that. Personal choice.
A very well-qualified friend (at least he was a friend until his daughter converted and married into the ѕуηαgσgυє of Satan at which point he suddenly decided I was a you-know-what) had occasion to examine the metallurgy of the Peshawar gunsmiths during the Soviet-Afghan mess. The image of homemade guns is romantic (and drives Schumer wild), but is a sad joke. You do not want to stake your life or the life of loved ones on that kind of scenario. Better you should pray the Rosary... always!