Hey Jim,

As always thanks for your reply I really appreciate it, who made those military conversions that you mention? Do you mean overstamped to hide the mark M2?
If that carbine didn´t leave the factory as it is, I believe that that conversion was made back in those days because of the stock´s inside spot where the selector is, it has the very same color and finish as the rest of the stock´s inside.
Regards
Eddie