I purchased some u-fix-em's from century and one has a mod that looks like it will use AK mags. Definitely won't use sks mags anymore. They gave me half off the price of this barreled receiver and another one with a broken rail.
I don't have an AK mag to try it, but will get one soon. Whoever did the mod was not a great welder, though the machining seems well done. Good thing the dirt-dobber's-nest-looking welds don't show on under the receiver.
I'll take some pics if anyones interested.