I know we might have a couple of Glock owners on the board. I need someone to measure the diameter of a stock 9mm barrel for me. My Glock 27 came with what was suppose to be a federal arms "conversion" barrel, but I think it is to small. Stock .40 barrel= .590 My 9mm barrel= .569 Help please!!! If it is just a stock barrel I just want to sell it advertised that way.