Muon weapon

A muon weapon is a type of weapon system, a directed energy weapon which operates by harnessing muon elementary particle.

By the late 2250s, the N'shaii had developed a ship-mounted weapon technology which produced a muon burst and caused severe damage to an enemy starship. When the USS Constitution (NCC-1700) was first hit by the muon burst in 2257, the Federation had never encountered an alien race who had developed the technology. Eventually, Federation scientists eventually managed to find a defense against the muon beams.