So Ruger has/ is retrofitting all those models. Must be in the thousands.
Their bottom line at yrs end will take a considerable hit. Not good. Labor costs are not insignificant. I was considering buying a Ruger Mark IV...not so much anymore. I liked the easy takedown feature but I'll stick with my Browning Buckmark Camper. No safety issues there, really well made, and it's a tack driver.