If both are aluminum then yeah. Metal rubbing against metal and all. Don't know if it will cause any issues other than wearing down the finish. If your sled is delrin then its probably still normal however shouldn't be severe. I believe that paintball gateway still has delrin sled for black magics if you need one. As to a direct fit on your application it will take a smarter man than I to know if anything is needed or it is a direct bolt on.
Autocockers are not more accurate, I'm just more accurate when I shoot autocockers.