Does anyone know if there are threaded barrels available anywhere?

I'm glad to finally found a site regarding all things R51. I bought my R51 shortly after it was released and have almost daily concealed carried it since. I regularly take it to the range and have never had any malfunctions. I have found it to be reliable and accurate. I started searching for other shooters to discuss wear/scrape marks on the action spring bushing to see if it's unusual or normal. I didn't realize the gun had been recalled.

Is this safe to continue using?  Is there anyone still actively shooting this model?