Help identifying. Hoping for something cool! =)

[bcurrey]

Buddy and I found this today. We were about a qtr mile from a national civil war battlefield site. Any guesses as to what it might be?

If just over 6" long. About 2" wide and weighs 4.5 lbs.

Appreciate the help!

 

[R Digger]

Kinda looks like a pin to attach and tow a canon to whatever was pulling it. Just a thought though.....