*Its only a coincidence that I have a sidebar ad over there for weapon mounted lights. lol
The Mini Cannon is a .177 bore (standard BB size). It uses black powder and any firework fuses. There is a knob to adjust the barrel up and down, for aiming, The carriage is aluminum and the barrel is solid brass.
The Mini Cannon is built and works exactly like the antique cannons of Napoleon’s time or the mortars used in the American Civil War
Here is some more info on cleaning and shooting the cannon… They are priced at $39 and it comes with a brass ram rod.
*More pics at link