I loved my glock stock. But didn't like the trigger. I am good at shooting but wanted a lighter trigger. I am going back to stock though. My g19 ran great. Just wanted the lighter trigger. It wasn't about the gun not running good.wow... best way to mess up a Glock is to fix what is not broken. Stock parts... polished a little bit... and shoot it. I'd also suggest getting a few lessons from sombody who know modern handgun methodology... a factory Glock runs fine once you understand what trigger reset is...