Re: epoxy sling stud
Unless you use the nut that come in from the back side, you may be in for trouble. When using epoxy to hold in a screw thread that may have heavy weight / strain on it, you run the risk of pulling the parent material apart near the site of the glue in. You may be able to buy the little internal threaded cups and make the stock tapered to be bigger at the inside and hold it in place. But I would experiment with the particular epoxy and different shapes before I actually did anything to my stock.
My current HS Precision stock came with the sling nuts already in place in the stock.
Have you contacted HS Precision to see what they suggest?