I have never tried it, but I would think it would depend on the type of rings you are using, if it is just a cheap set of iron rings, and they have bevels on the inside of the ring, just flip the extra top ring put the bevel down. On all rings I have used the bevel faces up on the top rind and down on the second ring. If it has a moly barrel face ring with no bevels then I don't think I would try it. Most companies will sell a set for one cylinder.