Shotgun tactics and usage are much different than pistol or rifle tactics and usage imo. I've never seen the benefit of a detachable mag fed shotgun, only liability, as least for stand alone use with no backup or support. I like to be able to top off the magazine on a shotgun on the fly. IMO detachable mag fed shottys are not nearly as versatile as tube fed mag, if for nothing other than to be able to immediately switch loads.