Czigot
Since: Aug, 2015
195.168.69.254
Since: Dec, 1969
GTA - The Armored Kuruma and the Duke O'Death are technically immune to bullets. Well, you are when you are inside them. The glasses are unbreakable (despite the gaps, the glass panels are completely impervious), and the bullets will instead drain the CAR health pool instead of yours.
The only way to disable these cars without explosives is with minigunS. Plural. 10 seconds of solid contact will force the engine to flame, smoke, then the car explodes. Of course, if you are inside of them, this is enough time to run away.
Explosives will send both to the smithereens, but regular bullets? Nope. Only FMJ bullets (purple magazines) can knock the bullet glass panels off a Kuruma and hit what is behind them, which means you. Explosive bullets won't kill the objective, but will definitely explode the car.
This is more an honourable mention than actually Immune to Bullets case.