I looked into a vintage scope but after a while decided to stick with iron sights. I removed the originals and put them away for safe keeping and mounted a set of Redfield Palma sights. Have not shot the gun with them yet but will on my April range date. Going to do some serious ammo testing to see what it will actually do at range. The original Krag is being rebarreled right now. The previous owner had completely neglected the bore and while the gun shot OK it didn't shoot well enough for me to use it in competition. Fortunately, I can rebarrel and use it and then put the original back on to sell it if I ever decide to. I'm not modifying anything else on the gun except to have the trigger polished so it has a smoother letoff.
Keith