The extractor is roughed out here, just grinding the cartridge carriers to approximate size, don't want to put to much stress on the reamer. The push rod will have a shoulder cut and silver soldered in place. The barrels will have a quarter section roughed out to accommodate the extractor. After soldering the barrels, it will be filing, stoning and sanding to finish the barrel 'cuts'. The marker lines show just how much excess steel has to be cut, ground and filed away!