Is there anyone that makes a scope mount that doesn't really require a base or drilling and tapping? Maybe a compression mount of some kind that clamps on the rear sight base. The reason I'm asking is I would like to see what some of my old milsurps can do taking me out of the equation as much as possible. I don't want to permanently mod them, just take them to the range shoot a group or two and move the scope/mount to the next one. I'd prefer something that doesn't make metal-to-metal contact as to not mess up the finish on some of the nicer ones. Maybe it is just a pipe dream.