This weapon can be picked up from the Sewers Safe Room.
Ammo
Combination
Effect
Explosive Rounds
Explosive A x Explosive A
Explosive Rounds are great against groups of enemies.
Flame Rounds
Explosive A x Explosive B
Flame Rounds are great against plant type enemies.
Acid Rounds
Explosive B x Explosive B
Acid Rounds are great against bosses.
You’ll be able to pick this gun up from the Sewers Safe Room. This weapon is powerful against all enemies due to having, Flame Rounds, Explosive Rounds, Acid Rounds, and Mine Rounds at your disposal. For example, Explosive Rounds are great to use in the Nemesis Stage 1 battle, as you can shoot him off the rooftops.