Back to an earlier comment.

Can you shoot shot in these bores as well?

Does it harm them in any way, or prevent reasonable patterns?

Need to clean the bore, before using a ball round?

I like the idea of being able to use both ball and shot. And also still think the reason the sights all fold down is to use the gun as a shotgun. Accept I could be completely wrong ie the earlier comment they all fold down for close up "ball" action.