They clearly have zero QC. I'm willing to bet not one person bothers to look over these firearms before they ship. In addition to my missing detent, the charge holes are not chamfered either. I have yet to remove the side plate to see what may be lurking inside. Upon calling S&W, they are eager to email a shipping label to get the brand new gun back there that just left a month ago to fix it. What kind of business model is that??????