Both of the O DISC's that I had the Comb was not high enough to get on the scope well - it is was great with open sights - but drove me nutz with a scope. I ended up using a 'comb riser' - then I just got rid of the stock and put Extreme/Elite stocks on them.

If you do not find a scope let me know - I will borrow you one from here - then I'll tell Terry I sold it and be able to get another one... But I only have 3x9's