I have a Shield 45 PC. The first issue it had was the trigger failing to reset. The gun would fire, eject spent shell and chamber a fresh round but the trigger would not reset. It remained locked fully rearward. I also noticed that the sights had moved in fact the front sight had almost fallen off. A gunsmith centered them but the gun continued to have trigger resetting issues, almost every round. I sent the gun to S&W explaining both issues. After a long 2 month wait, why can Glock and Walther turn around warranty repairs in 2 weeks, the gun was returned to me. S&W replaced the sights and test fired the gun. They said the sights were causing the trigger issues. Anyone ever heard of this, I sure have not. I have not test fired the pistol myself but remain skeptical that sights could cause trigger issues. I did not speak to a gunsmith at S&W was not allowed to. I received that information from a phone "technical" rep.