Mossberg carries replacement parts and services SA-20 shotguns in the US.. If you’d like to see the facility, follow the river from El Paso south and east for 500 miles. They don’t do tours though and are rather unfriendly to salesmen, again this is based on personal experience. If what you stated was true Mossberg wouldn’t sell many SA-20s. It’s not any different with the SA-20 than it is with a Springfield XD. The XD is made by a company in Croatia but parts are available in the USA and repairs are done here. Also SA-20 replacement parts are easier to get than Benelli parts if you ask me.