Any thoughts? Iv'e read the universal posts. The one I've put money down on has: Serial # 344XXX, Univesal and patent number on receiver, vented metal handgaurd, threaded barrel, receiver looks like metal not aluminum, no bayo lug, Its guaranteed to fire and feed, cost is $250 plus tax. Is this one of those that have no spare parts? Haven't checked to see if the op rod is two peice or welded. Guess I need to inspect the mag box?