As part of the GenkiBowl 7 DLC, I was awarded the Genki Mobile, featured in the the PR missions of that DLC pack.
It shows the flamethrowers as equipped when I get in it, with infinite ammo. However, I haven't ever been able to activate them, despite my best efforts at running down pedestrians.
Is it possible to use the flamethrowers on the Genki Mobile? Or are they sadly unavailable outside of the "PR" side mission?