I will try to take the buttstock off and see if I can see a serial number underneath it.

So what type of scope would be correct for it? An early one to go with the buttstock or a later one for the receiver? I guess it does not really matter as it will always be mismatched either way.

Does anyone here know much about the history of Interarmco? I would love to know how many of these came into the USAicon by them. I am guessing they came in by ship and were shipped by rail from the tags on it. I can't make out the source on them unfortunately, only the destination.