I think a few rocket salvoes would give Nick a run for his money, especially if you tipped the warhead with Novichok or something.
@Mikedor
I've always assumed that there would be conventions in place, but I suppose you'r right. Maybe someone like Chernobyl-Pripyat with his AN-94 style rifle could stack alternating JHP/FMJ rounds and use the 2-round burst to fire both AP and stopping rounds at the same time.