I have a Benelli Super Black Eagle and just purchased a Tacstar 8 shot magazine extension. The extension simply screws on to the current magazine in place of the magazine cap. When I went to add the extension to my shot-gun, I realized there is a manufactured cap that is included on my original magazine that will not allow shells to pass through into the magzine extension. I am not sure how to remove this or what I should do to be able to use my magazine extension. Anyone know what to do in this situation?