The Tau Earth Caste have provided the Vespid Stingwings with the technology to mount these weapons upon advanced and highly efficient neutron containment and projection systems, making them amongst the most deadly weapons of their type -- capable of emitting short-ranged but deadly streams of neutron radiation that are able to pass straight through all but the sturdiest of ray-shielded enemy armour to reduce biological matter or delicate machine circuitry to cinders. Neutron Blasters are only usable by the Vespid, for the constant, ultrasonic tone emitted by the vibrations of their wing casings perfectly modulate the energies contained within the crystals, and continued exposure to the crystal’s neutron radiation will prove ultimately lethal to any other species.