Sorry, it was “most AKs”, not all...
http://www.freerepublic.com/focus/f-news/3143935/posts?page=31#31
It all has to deal with ATF .922 regulations.
GWB’s AG, Alberto Gonzales made it illegal to import barrels from any foreign battlefield rifle.
A pointless law that drives prices up, ruins historical accuracy, but employs US manufacturers.
I don’t get it.
Pointless bureaucracy.