I have contacted Shilen a half a dozen times over the years regarding barrel questions etc and found their customer service to be just fine. Honest, informed etc. the two smiths I have used to install them always commented that they were always great to work with. The distributer I have used " The barrel man" has nothing but good things to report as well. I have a number of friends that have more than one with zero complaints. Buy with confidence, shilen would not have lasted this long without doing things right.