After 2 trips to the range I got it sighted in, had to modify my site adjusting tool to fit better. The rifle is very accurate, never jambs. The fold able stock is not a problem, I have found it to be very stable and comfortable as I was worried that it would be less so than the traditional wood type. I put a round file inside the gas piston tube to clean it up some from the rust, will replace the item in the near future. Used an unknown brand of recoil buffer, works well, had used a Buffer tech brand on my others, they are good too.
Still no info on the receiver, the Romanian and Yugo types are correct for the guns, either an American maker is an artist at making an exact replica of the receiver, or they were brought into the country intact. My Romanian AK-47 that I used to have probably was original, and not new to say, but may have been unissued. I do remember seeing the arsenal marking of the triangle faintly stamped on it, so it was not an American after market receiver. My current Yugo is stamped with the Century maker's name, but is clearly of Yugo structure. The trigger is excellent, it is Tapco brand, and breaks at a clean 3.75 pounds, very nice for a military trigger.
Most shooters see TV everyday and observe the American soldiers in Iraq-Afghanistan, so they must buy an AR-15, subtle advertising. I went with an AK as they are far superior to the Armalite design for military use, I also see lots of used AR-15's in gun shops, so many people get rid of them. The private security agencies in Iraq won't use an AR, American soldiers also prefer the AK and have used them until regulations stopped that. The stories of continuous jamming shows that the AR should be replaced.