I had a Williams tang sight and hooded (!)"glow-worm" front sight on a JES rebore 358-99E. It had VERY quick sight acquisiton, and was a bubba 99 delight to hunt with!
I too would vote for a tang aperture sight over the barrel mounted "ghost ring", because sight radius makes all the difference with iron sights. But the buy-in price of those bulls-eye sights make it a pretty risk-free experiment, if you don't add in the spent ammunition.
