FYI - Safety recall for Ruger Mk. IV and Mk. IV 22/45 .22 semi-auto pistols. Details in the video here...
https://ruger.com/dataProcess/markIVRecall/
If you own one you can check the serial number further down the page.
https://ruger.com/dataProcess/markIVRecall/
If you own one you can check the serial number further down the page.