On another ml forum someone raised the same question, and a follow up question was asked, if you have a caplock rifle or a bp revolver you remove the nipples to clean, so why not that liner? Seems to me that if it were not meant to be removed, as frequently as the owner desired, there wouldn't have been a liner, the maker would have merely drilled a hole in the barrel. That would have been faster and cheaper for the manufacturer. Just my 2 cents worth, I prefer a caplock.