It's a minor thing but not figuring out what it is bugs me a bit.
On the top rail (photos below), near the front sight there is a small "thingy", for lack of a better word, that looks like it has D ring (on the right side, top) on it. Maybe it's moveable front sling attachment, maybe it's something else. Does anyone know?
Left side pic, thingy is about 4 slots behind the front sight.
Right side, thingy is about two slots behind the front sight.