Then you're already half way there!

But you're right, a turret would be sweet. You could have a big red flashing button on your steering wheel labeled
"Move Bitch!"Upon pushing it, out pops a joystick from the center console (similar to the Thrustmaster Flight Control System)

It swivels toward you, resting on your lap...when all of a sudden, Heads Up Display crosshairs are projected onto your windshield.
Radar lock, we need radar lock dammit!
:::Beep, Beep, Beep::: (sexy woman voice) "Missile Armed"
You push fire on the trigger.
BOOM! The road is clear!
Yeah...I'm really busy at work today...can you tell?
