I finally got my 338 ultra and then I finally got my ba/cb adapter. I have an ultra 9 and I don't plan on getting a 338 rifle, so I already have CB mounts on my guns. I went to test fit the adapter and the suppressor will not fit on the adapter. The adapter fits fine on any of the CB brakes with no problem. But the suppressor gets hung up after a couple turns on the outer threads of the adapter. I checked the fit of the suppressor onto the 338BA brake that came with it and it seated onto that with no issues. I went back and cleaned the threads of the suppressor and the adapter and still the same issue. Am I doing something wrong? I know the 338 brake that comes with the 338 ultra was redesigned but it should still be able to use the adapter right?