Hi, I just bought my first revolver a few days ago, it is an S&W 629 Deluxe 44 Mag. Once I got it I was doing a quick inspection and I realized that a pin was sticking out from the frame a bit.I have no idea what the pin does and I don't know if I should just tap it down or if there is anything I need to do beforehand. I attached a picture, but just in case you can't see it, I'm referring to the pin located right after the ejector rod, it seems like it is securing the rod release to the frame. Any advice please