My Yugo M72 will shoot sub 3" groups at 100yds with Wolf "military classic", with iron sights... I have a hard time due to aging vision and have planned to install a scope. A guy at work has an Izmash manufactured quick release scope mount for me...50 bucks. From what I have figured out I'll probably need one of those long-assed Belarus scopes to give me the eye relief I need. When I got the RPK and fired it the first time I was amazed at the lack of recoil and the "lazy" bolt action, I like it very much. I installed one of those bolt carrier recoil pads and was impressed at the way it sped up the bolt action, allowing very quick three shot taps that hit man-sized targets at 50yds nicely. I have heard from some folks the buffers can damage the mechanism because of the forward slamming but a few mechanics tell me to forget about it. If I experience any undo wear or malfuction I'll simply remove it.
Mounting a scope on this rugged, man-gun, doesn't fit its image IMO, but then again its good to be able to hit what your shootin at.