The exploded barrel looks like it was once an 1841 six-pounder replica.
It was probably once a very nice cannon. And if that's a standard sized can of WD-40, a fairly substantial chunk of bronze. It would have likely given a lifetime (or more) of service had it not been subjected to such gross abuse.
What really chaps my butt is that I want a ¼-scale bronze 1841 in the worst way, but just can't afford it right now (and probably not in the foreseeable future).
And here this one is, blown to pieces in an act of ignorance...