Just dug this up at my farm site that dates back to early 1800's
It looks like a sight at the front of the barrel
And also has some sort of line running the length of the bottom. Obviously I need to clean it up more. But wanted to get your thoughts
I hope you can get an ID, although I think there isn't enough for a match. Either way, I'm sure it's a gun barrel. Perhaps the existence of rifling on the inside can help you determine the approximate date.