I used to visit Federal Ordnance in South El Monte CA. This was back in the 80's. They had dumpsters full of 03 parts that came back from the Phillipines. And they had crates of Sedgley barrels.

They rebuilt a lot of 03's with USMC Sedgley barrels. I saw them on the rack.

So, just because your rifle may have a Sedgley barrel does not mean it is a USMC rebuilt.

I have an Augusta Army Rebuild 03 with a Sedgley barrel that is not marked USMC.