Try Advantage Tactical Sight's universal shotgun sight --advantagetactical.com. It has really worked for me on my Rem. 870. I was a little skeptical at first because the concept was so different. But once I stalled it, and it was easy to install, it was fantastic. I hit targets with slugs at 100 yards. It is also the fastest iron sight I've ever experienced on a shotgun. It's just quicker than any conventional sight or ghost ring type. Another friend who has one on his shotgun actually shoots clay with it. The only down side is that you have to remove the front sight before you install the Advantage Tactical mount. Once you do that you can install their mount in about 30 seconds.Is there a sight available for this weapon that doesnt require extensive modification for the rear sight ?