Would it be feasible to enter a situation with a gun that was a 9mm carbine on top and a bean bag or rubber bullet cannon below? A crazy guy just got killed today for running at police that warned him to stop. There are too many incidences where the only option is to go from verbal commands straight to lethal force. Would a combination gun work for these situations? Especially when the police pull up in a car they wouldn't have to tote such a weapon around with them. The length would only be governed by the minimum barrel of the cannon because anything over 4" like a standard arm is good for the 9mm to be effective. I realize these device can be lethal depending on where the person is hit, but they would have a 90% chance of survival over a 90% chance of getting killed by a bullet. Feedback please.