Back in the 1800's revolving rifles were introduced. However, one little flaw lead to their demise. Ball and cap revolvers had a tendency to chainfire, which is all of the rounds igniting at the same time. While this is bad enough with a pistol, imagine having this happen while your hand is in front of the cylinder grasping the forearm stock. It kinda makes it hard to count to ten any more unless you take your shoes off and use your toes.......