Well, before I got skittish, this post was just about the strange plug repairs. I have seen them on well used military stocks, but never on a stock that was probably never out of the barracks. This stock has several minor storage dings/dents, but nothing to indicate that it was ever bounced around a battle zone.
So, this stock must have had some flaws that were repaired as shown and still passed the DAS inspector. I had not seen that before.