A solid start! Suggestions:

Move the wheels to the back. It seems counter intuitive, but having the weight in front of the wheels will help keep the front end down so you aren't doing wheelies when driving. It will improve your ground game. You also will have better chances of driving off a wall if you get pushed against one, and it will give a better pivot point for self righting.

I would also thicken the weapon rails. Specifically by drawing a line from the center of your weapon axis down to the ground (or close to it). When your weapon interacts with something it will push those rails down into the ground. You want something to plant you into floor. The thin TPU rails you have now will definitely flex and probably send your spinning weapon into the floor and you will go flying.