Nothing like the original company Quote: "If your M37 was made before the 855,000 mark (which occurred in 1963), we will be able to furnish you with a replacement barrel for it, but you must send your gun to us for the barrel to be fitted. The process includes machine removal of existing threads, insertion of adapter and re-threading of receiver and re-bluing. Please note that once this is completed you will not be able to reuse your old barrel. Cost for this process is $180.00 for the adapter, plus cost of barrel. Includes re-bluing at no charge."
