Just wondering if its legally possible to build an AK-47 from scratch with US/other parts like you can with an AR-15. I know at some point with the AR building process you need to register it as a gun. Not sure all the details, but I guess what I was wondering if you could do the same with an AK? Oh, I also mean from pre-made parts. I dont' want to make my own receiver with a drill press, etc.