So you think that Russian made AK's (Saiga) remanufactured by the US company Arsenal are among the best, good quality AK?
Yes, I do. A Saiga that you convert yourself with sufficient time and effort also would be. Another option, though a very poor value in my view, would be the "Bulgarian" pattern AKs made by Arsenal.
US-made AKs by Century are made by barely skilled / barely trained low wage workers who know their product is going to the plinking market. Saigas are turned out in the same family that makes military AKs for the Russian and other armies. All parts are to military spec except those which can't be due to law (e.g. now full-auto mode). The very important bolt, carrier, barrel, and receiver are to spec. The barrel is hammer-forged and chrome lined.
A completely US-made AK will have a cheap button rifled barrel not attempting to hold any tight tolerances. Yes, I will take the Saiga barrel over that any day of the week. And if my suspicion about investment casting of nearly all parts is correct (with the bolt probably machined from billet), then I would also take most imported parts kits as well.
Non-Russian AKs vary all over the map, even within a country. Romanian WASRs are bottom end, while Romanian G-code are somewhat better. Yugoslavia knew how to make nice rifles but most of the ones here are made from parts kits, usually from rifles that saw heavy combat and are correspondingly worn. Most of the Chinese AKs were good quality, but again there was a range from merely good to excellent (and they're mostly collectible now since import ended almost 20 years ago).
If you have a US-made agenda, fine, but if you want the best AK pattern rifle you can buy, my comments are above.