I have a post war R in 300. It has flat bottom sling studs that look like the one in the picture in the link posted above. I think mine is a 1951. The studs are wider than new studs, and new swivels won't work because the stud is so wide they won't latch. I really didn't notice the little spring loaded latch wasn't secure until the sling came off walking across a field last year. I grabbed the sling before the rifle hit the ground, but the muzzle did get a load of mud in it. What should post war studs look like, Joe.
