I have made provision on my rifle for a rear peep sight. It is just enough to see over the top of the normal rear sight, held with screws, bit of room for windage. When it is not on the barrel, I have blank screws to fill the holes, so as to not be TOO terribly un-PC.
But, might also emulate Mike, and put a freaking scope on it! THAT would be a treat to see! Might do it just because I can. What do ya think, Mr. Brooks? Weaver K-6?