I once bought a set of the military swivels at a gun show. They didn't fit without modification, but I can't remember why. I think the pin would not fit into the base receptacle without drilling the base. I didn't want to do that. If you could figure out a way to reduce the diameter of the pin, I think they would work. I don't know what rifle they came on. My solution for LRF would be to bite the bullet and pay ebay prices for a set of Winchester swivels.