How about a meson gun?
High-tech weapon that creates high energy mesons and directs them at targets. The collision of an electron and a positron creates a pi neutral meson. Mesons have short lives, which can be prolonged to precise duration by accelerating them to relativistic speeds. Range is set by varying the velocity of the mesons.
Mesons can pass through armor and matter without resistance. They do not interact significantly with other particles, and matter is therefore transparent to them. However, in a short time mesons decay into high-energy particles which do interact. If the point of decay is manipulated to occur inside the target ship, the result is high energy explosions and radiation damage. In a meson beam, the mesons travel to their target where they decay and release a large amount of energy.
That would upset everyone with hull tanks! Lol!