Exactly my point!!! He stated that "O" rings will never be part of his rig set up. In the 2+ dz that I have bought and have been given by GR for several animals that I have sent them pics of, not 1 "O" ring yet!!! Well, that leaves GR's in the mix, no "O" rings!!! And $50 for a pack of 4, not 3 with one being a practice head. 3 Hunting, 1 practice.