10ga Salute Cannon
Since I was a little kid, I always wanted to make a cannon. The dream has been realized.
The barrel is turned from a piece of brass 2-1/2" in diameter and 13" long.
The cannon features a simple breech design that has been in use for 100 years. It is fired by an inertia hammer. When the breech is open, pressing down on the hammer activates the ejector which pushes the shell out far enough to grab and remove.
Here is the machined, but not polished deck mount.