old post, but great pics...id say its done....looks like barrel was installed by someone other then the military, notice the finish differance in the barrel and reciever,
id take Jims advise and see if you can get a crankshaft reuilder to magnufux check it...you will have to completely take the rifle down.
most car guys like guns as well, and will be happy to help.
id like to save that pic for my arcives if i may...
so far 3 1917,s have surfaced in the last year with fractures from barrel installations....{not done by the military}
thanks for sharing the info.