Except that you can buy any other ak from x number of countries.. Gunplumber from falfiles and akfiles is right.. Ak enthusiasts are cheap asses and as long as someone is selling questionable parts for $20 they will skip over solid parts from reputable dealers for $21..
You still can't come near building a full US made ak for anywhere near the price of a yugo kit on a nodak receiver... There will still not be a market for a US made AK.