Ringshot (winterbeak)

You know Newtons third law, right? When you fire a cannon, a force is applied to the ball, but an equal force is also applied to the cannon. The reason the cannon only recoils slightly instead of flying away is because it is significantly heavier. But what if the cannon were to fire something of approximately the same mass as itself? The result would be both objects launching at equal speeds in opposite directions. You know what has the same mass as a cannon? ANOTHER CANNON. Made in about a mont...