When it comes to personal weapons comparable to a hand-gun there's not much in the way of complicated electronics. The most that I can think of would be TASERs and holographic sites; neither of which are particularly complicated.
Cars aren't generally used as personal weapons. Their size, cost, and the difficulty deploying them rapidly (think of how long it takes to accelerate from stop compared to drawing a gun) makes them a poor fit for that roll.
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