Pyrotechnics is the 4th prestige weapon, and the 3rd upgrade of Fireworks. Unlike Fireworks and Grand Finale at level 5, Pyrotechnics's fireworks deal less damage than Fireworks's and Grand Finale's. It does have explosive stars in the biggining of the firework show though. It is best at group damage, having a huge radius. It is a nice weapon to have in your arsenal.