Does anybody here know how these guns are regulated?
Are the barrels threaded in and regulated free floating - THEN the ribs soldered on? Or do they attach to the "action" in another way?
A overhead view would be nice to see - perhaps the bolts are geared together like counter-rotating crankshafts thus being worked by the single bolt handle. This in a clip-fed .22RF double would not be too difficult to design/build.