Yes the bipod DEFINITELY affects accuracy at mid to long range if it is damaged or badly damaged. Worn doesnt seem to be an issue but the last two most certainly have a painful negative affect on a long range shot. As someone who exclusively uses long range rifles in both the mod and the SA I have learned that these parts should always be as nice as possible for accuracy. The compensator (from what i can tell) only negatively affects the shot if it is badly damaged or ruined. Hope that this helps. :D