Dont even think about buying one of those scope mounts that mount to or replace the bolt shroud. Unless you want to spend time at the range rezeroing after every shot and looking like a complete ignoramus.
i keep hearing this, but i also keep shooting ~4" groups at 100 yards without ever re-zeroing. it's more accurate than i am and i've seen better shooters tighten that group up using my rifle.
~1500 rounds since i zero'd it, still as accurate as the day i fitted the cover to the sks. perhaps people are using cover mounts that have been fitted for a different rifle? or perhaps they just didnt fit it properly to begin with?
i dont know why others have problems, but mine sure doesnt