I picked up a cleaning kit that was for a 10/22. I don't have one, but I wanted the rod. The kit had two cool things, a bore-guide for the muzzle end, and a patch collector box thing that went in the breech. http://gunsforsale.com/gun-cleaning-kit-ultra-ruger-22-lr-62009-gunslick-1 I think perhaps the copper cladding is there to help the cycling of semiautomatic actions. Maybe, I don't know?? I prefer plain lead in my bolt-actions.