ANY peep sight is easily switched to a ghost ring simply via removing the sighting aperture & shooting through the resulting ring.
The Lyman sight has a QD release button, so the horizontal sighting staff can be quickly removed if needs be - and returned to zero when reinstalled - but with a Scout scope setup, the peep can be left mounted, as I've found that (for me) it doesn't unduely obstruct the sight picture (YMMV, though).
.
.
