It would be nice to assign cannons to a certain firing order, when you have 2 canons in front, 2 at the back, and 2 at each side, hitting C fires `m all.

But assigning the front as #1, back as #2, sides as #3 then you would have to hit the C button ones to fire front, a second time for back, and a third time for sides.

Or perhaps C would be a selector for the canons, but a number would be the canon you fire.

Having 5 canons at the front of your vehicle assigned numbers one through five, you select your cannons by hitting the 1 through 5 keys, or if you want to fire `m at once, just bash the keys