I have a mossberg 500 on the way and it has the standard beed sight on it and I want something more. I'm looking at the ghost ring combat sights or an optic. What do you guys recommend
I'm not an expert on shotguns but I have ghost ring sights on both 18.5 in. barrel tac guns I use for 3-gun matches. Your post title says HD, and I assume you mean home defense. At that kind of range, ghost rings seem like a perfectly good choice. HD is pretty much a point and shoot thing anyway.
I have Wilson Combat Ghost Rings on my 18" tactical Remington 870. If your shotgun is going to be for HD only, I would say try this out: http://www.brownells.com/.aspx/pid=40133/avs%7CMake_3=Mossberg/Product/MOSSBERG-SHOTGUN-TRU-DOT-reg-NIGHT-SIGHT