Some AK barrels are threaded (Romanian and CommBloc I believe), some are pressed (Egyptian), and some are pinned (Chinese).
Check out this page also:
http://www.ak-47.net/ak47/nhm91.html
The History Channel is running the special on the AK series rifles on, "The History of the Gun" this Sunday night! Be there!
[This message has been edited by Destructo6 (edited June 16, 1999).]
[This message has been edited by Destructo6 (edited June 16, 1999).]