I'm a new handgun owner and a proud owner of an M&P 40 full size. I love the ergonomics and it's very accurate, but the trigger is gritty feeling. I recently tried a new M&P 40c that didn't feel at all like that. I've done some research online and see that it is a fairly common complaint with the M&P line. I know that a lot of people upgrade the trigger and seer, but I'm not ready to go there yet. I spoke with S&W and they said that I can send it back under warranty and that they would take care of it. Has anyone gone this route? Did you notice any difference (hopefully an improvement)? Thanks!