Left me high and dry. Ignored my calls, messages, no class at all.
I committed to buying an ACOG from Sean. We talked on the phone. Then he called to delay the exchange. I said no problem. He never contacted me again. I called, called, messaged, called. Nothing, no " hey sorry, I don't want to...
P. Stand s for process
The RI stamp is the mark of a WWI-era RIA stock and the 3GM-K is a WWII rebuild/inspection mark of unknown origin.
I would highly recommend C.S. Ferris' book, "Rock Island Rifle Model 1903". It has a large section on these RIA/SA "original" mixmasters.