In Artemis Fowl, the Neutrino weapons used by the faeries are not actually neutrino ray guns, but a substance called HCSP (High Conductivity Soft Polymer) which conducts electricity. It is charged with varying levels of electricity while leaving the gun, and dissolves upon impact at high enough velocity while imparting its electrical charge into the target.

Wouldn't work well against dry kevlar, but I suppose you just bring the right tools for the job. I think it's worth exploring polymers, though a dissolvable polymer sounds like microplastic hell.