First of all cure, check your posts, it says "under $500.00" and that my good man is NOT way over dealer.
Secondly, do the math again on the wall dimensions. Remember, you have to divide by 2 when you subtract the bore diameter from OD of the M4 cut, provided you make a barrel with the bore in the center.
73easting: Thanks for the comments, but your dead wrong. My beef is not that he is selling accessories as a non FFL dealer, my beef is that he is whoring the market for all of the Oly distributors just because he has some sweetheart deal from the factory as an employee. He obviously does not understand macro-economics at all. And you criticize my reading comprehension!? PLEASE, take a look at ALL of thecrue postings if you want to help someone with proper english issues.
Finally, Steve, aka thecrue, nothing personal, but PLEASE, try and use the "period" in your sentences. It's on the bottom right of the keyboard in case you can't find it.