Her gun is made to be able to fire ammo that travels several lightyears in a flash. There's a reason she is called the cosmic sniper, that bolt she fires is pretty much ripping a hole through the laws of reality and bypassing the light barrier many fold... so when it is fired it leaves a catastrophic though thin streak of volatile particles wheresoever it's trajectory was.
Like, you see for a split second a small particle of light shoot through the night sky then a tear explode from it's path, of course for the target of her love taps, they will be dead before anything has been seen.
She could be several galaxies away, her eye of hades will allow her to find her target from vast distances.
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