Probably the same thing an extra Siler Flintlock would be good for.
Sorry but you left the door open.
Is it a straight barrel?
How long?
How much work do you feel like doing?
How much money are you willing to put into the new project?
What have you wanted to build but never got around to?
You can use it for a property corner marker! I've seen a lot of old musket barrels marking property corners especially in Georgia. Betcha ain't ever heard of that before :haha:.