Speaking of German prototype turretless AFVs, check out this oddity:
https://en.wikipedia.org/wiki/VT_tank
From the article: "The idea was that the tank would close in on the enemy on a zig-zag course (
Wedelfahrt, much like a skier wedeling downhill). The target would be locked into the aiming computer, the gunner would hold the trigger and the gun would fire automatically in the moment when the muzzle was on the target during the next change of direction."
The two guns aspect of the design was intended to increase the chances of a first-hit, I suppose? Or do the barrels alternate firing between directional changes (i.e. one fires on the zig, the other fires on the zag)?