Bob did great work at Very reasonable prices to boot. He is gone now and I was luck to have a 577 built for me by Bob...Its so well done thats is nearly impossible to see where the barrels join the mono-bloc. We used barrels I purchased from Lothar Walther...Fine gun!!... I have missed our long talks on the phone...almost like a brother.. His wife Marie said it was a good thing that the two of us didn't live closer...Hah