I have an Iver Johnson 22 Supershot sealed 8 top break 22 caliber revolver. It has very thin / rounded top front sight blade. The front sight blade is slightly bent and thus I want to remove it from the barrel to see if I can straighten and then reinstall it. My question is how to remove the sight blade from the barrel. I am assuming that the blade channel on the barrel is either beveled or has some other means of retaining the blade in the channel. Is it possible that the blade has some hooking mechanisms that holds it in the channel ? Do I attempt to remove the blade by tapping it from the front or from the rear ? Is it possible that it can be pulled just straight up and out of the channel by getting a good hold on it and pulling ? Thanks.