Yes, there were some NM RIA's, which performed very well, if not better, than the SA rifles. It is an interesting story within itself, as there was some armory vs armory conflicts over the matter. The RIA NM rifles did indeed have GG stocks.
As for the C stocked RIA's and your particular rifle, I will give the floor to others. There were some RIA's with original barrels in that date range if I remember correctly, but since my memory really sucks, I will allow others to elucidate.
Jim