An idea for an EMP/ion style weapon.
A shot similar to the current plasma weapon, but it does no damage to structure. Instead, any wiring within a small radius of the impact is damaged. Idea being that it disables small ships and can disable surface systems on larger ships with minimal structural damage.
I'd suggest either a slow projectile and/or slow fire rate so that this weapon can't chew through small ships.
Uses ionised gas as ammo, requiring a special magazine similar to plasma weapons. If the magazine is destroyed, the explosion would destroy all wiring in a radius around it, disabling the ship using it.
The weapon could be modified to use different gases that have greater ion effect, faster fire rate, faster projectile speed, at the cost or benefit of greater or lower power consumption.
In fact, this weapon could potentially be a modified version of the plasma weapon.