As far as I know the Dlask front sight is meant to be used alone and is an evolution of the raised bead. It would be too low for a standard Scattergun or LPA rear Ghost Ring sight.
You could make a really low custom rear sight up and braze it to the barrel but it would be easier to just get an LPA or Scattergun or Mossberg Ghost Ring set installed.
If you practice a lot the simple front bead can be surprisingly accurate provided you get the same sight picture and reference points every time.
Cheers