Exactly JMOORE- More details for you... It's a Beretta made- Danishcontract marked FKF with crown with a serial number PB 92xx on the heel where everyone elses usually says "U.S. Rifle". It was converted at some point during refurb to 7.62 (- 1/2 inch-> 7.62x63 is 30-06 after all, and 1/2" is pretty close to 12mm making it 7.62x51), and appears to have been stored after that- given the cosmoline
in every nook and cranny. Same type as yours ARADO, just built 9000+ later.
Any suggestions on Commercial .308? Probably not much to worry about with the Shuster gas plug.
Thanks