A cannon is just a steel tube which has a shut stop and an open finish. The closed end has a small fuse gap. To load the cannon, you pour in gunpowder — a mix of charcoal, sulfur and potassium nitrate — after which drop in a very cannonball. https://damienwcgfh.blogaritma.com/36293779/machine-gun-can-be-fun-for-anyone