Sorry for the shaky pictures. As you can see, none of the parts exhibit the "green tint" that I see on so many A3s. I noticed one cartouche on the left side of the stock cheek with "RIA" which I assume is Rock Island Arsenal. Why is that mounted on a Remington manufactured weapon? Does that mean it's not original, or was it a leftover from the RIA days?

Thanks for your help!