https://www.midwayusa.com/slings-and-sling-swivels/br?cid=22411&targetLocation=%2F_%2FN-0%2B4294964959%2B22411
Don’t know why that won’t go hot but copy and paste the link above.
The sling loop comes out by removing the bottom screw on the butt plate.
Thats cool. Didn't know they made those. May have to order a couple. Not sure I have a use at the moment but....
One could use the old M1/M14 web sling pieces too