Thanks for the feed back. I just put some black finger nail polish over my pin until I get my Apex trigger for it.I took shot my new shield plus for the 1st time a week ago. Only ran roughly 120 rounds through it. While getting ready to clean it at home I noticed the pin had fallen out and was missing. The gun never malfunctioned during firing. Called S&W customer service Friday to explain the issue and ask whether the pin only secures the trigger safety or if the trigger is at risk of not working without it.
They are sending me a replacement pin to install at home. Would you ever trust this trigger/gun again?