There aren't that many, but enough to tell the stories they are trying to convey. There are some interesting maps showing what battles the units with the local troops fought in which were quite extensive as well as some individual soldiers' stories during the war.
The only artillery projectile on display is a small spherical metal ball which looks a little small to be a 6pdr and the label accompanying it refers to it as a "steel" shot. I have that guy Eric's card and if I get a decent 6pdr solid shot I think I'll contact him about replacing it. He seemed more interested in the building's history and the GAR period than the war relics.
There used to be a zinc and cement soldier statue atop the building but it got dropped during one restoration and smashed "in a hundred pieces." Its been put back together but is too heavy for the roof so they are going to cast a reproduction one out of something lighter and display the original inside.