Disallowing sawnoff/car spray bug!

[CrossBones]

how does it handle in a real fight?

If you mean how can it be used in a fight, here is the respond. 
1. The abuser which will be the guy that is using this bug, will exit the vehicle and can easily take his opponents armor if not armor at least 50hp which is not that bad in a 1v1 fight (unless their aim really sucks).
2. While having low hp. The abuser can keep doing the bug which will give them the advantage by not taking damage ,and still being able to damage us by abusing this kind of bug.

I hope I answered your question.
Regards L0kw!