I would think it's a cheapest way of preventing the locking lever being pulled back through. A pivot is required to enable fitting of the bi-pod attachment lugs, to manufacture a pivot method using fixed fulcrum would be more expensive than drilling a hole in a piece of metal that's already there and then fitting a 0.1 pence copper split ring. I would also suggest that a split ring is used as this will catch on nothing, unlike a split pin, that could and inevitably would catch on grass/heather etc....
Buckden , worried about you ! ! wasnt it at the bottom of the apple barrel!!!
anyway Duncs not a bad question have oft pondered the reasoning for the
said ring , have given it a tug or two but no ideas, so there must be a bright spark out there that is willing to share wisdom of the ring. If not I am in trouble coz I got 3 8)
tartin got my money along with Martin,It pays to investigate the little things.I have a vision off all harris owners saying , course I knew what the thingy was for, although as usual it was a thingy we all knew and nodded at the gunsmith at the point of sale , else we looked like Twxxts!!!.