On Gunbroker, there's an auction where the guy is selling an Belgian Metric barrel, but he had it installed on an inch pattern receiver. He claims that he shot the gun all the time. Huh? How does that work? I tried the opposite. I tried to put an inch pattern barrel on a metric receiver (basically the opposite of what he did) and it would not head space, the threading was different.

Any FAL experts here? Who can enlighten me as to whether it's worth bidding on a metric barrel that was force fitted onto an inch receiver?