I'M pretty green as one could be about glocks. I just purchased a gen3 22 and when I got home I noticed what appears to be a pin missing. My neighbor has a gen 4 22 and the hole has a pin it. Is there a reason this could be intentionally done. What is the correct term for the missing piece? I put a piece of string in the hole to show what I'm talking about. Thanks for yalls help. [Broken External Image]: