Wow, I had no idea these were so rare. Thanks for the great tips.
My Virtua Cop 2 game came to me with 1 blue Sega gun, and 1 blue Happ gun. The Happ gun is giving me issues, and it always kind of bothered me anyway since it's the wrong color and is not the right gun for the game. I may need to look into just replacing both the guns with new Happ guns.
Maybe I should consider replacing the halves on the Sega gun when I remove it, as I could probably recoup most of the money for the replacements by selling the Sega gun...