Used to use an RD6, now I carry the R.A.K. Either one will do you well. The R.A.K. is easier to choke up on if you need to do anything that requires a bit more control over the tip of your blade in the field. If you go this route, make sure you take the hard plastic insert out of the nylon sheath and boil it, then re-mold it around your blade and reinsert it into the sheath. I didn't feel that the fit was tight enough for carry.