Let's assume that parallel universes or dimensions exist. I would like to know what are the hypothetical properties needed to make a sniper rifle (and the bullets) that can snipe a person in dimension or universe A from dimension or universe B.
closed as primarily opinion-based by user535733, Vincent, L.Dutch♦, nzaman, Aify Jun 23 '18 at 6:08
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Waste of Energy
The amount of energy required to connect two places from two separate universes is quite literally astronomical. Possibly the equivalent to the mass of a galaxy converted into energy at 100% efficiency. If you can create and manipulate such energies you are in quite literal terms, a god. When you can unmake galaxies why even bother with a single man, let alone something so underpowered as a gun?