Torpedoes will fire a small rocket at the cost of 4 ammo per shot. The rocket travels in a straight line at a velocity greater than a standard Torgue assault rifle, exploding when it strikes an enemy or obstacle.
Upon exploding, the rocket delivers 100% of its gun damage value as splash damage in a small radius. The rocket inflicts no additional impact damage upon a direct hit. Bonuses to grenade or splash damage will not increase the damage delivered, nor will bonuses to rocket launcher damage. Bonuses to gun damage such as Axton's Impact skill, however, will increase damage delivered
Boom Puppy - Unique assault rifle that fires rubberized grenades that explode with every bounce before finally dissipating with a large final explosion.
KerBlaster - Legendary assault rifle that fires one projectile which has a straight trajectory and releases a short-fused grenade upon impact.
Peak Opener - Effervescentshock assault rifle that shoots one rocket which drops 3 explosive child grenades and has increased fire rate when zoomed in.
Borderlands: The Pre-Sequel
KerBoom - Legendary assault rifle that fires one projectile which has a straight trajectory and releases a short-fused grenade upon impact.
The Torpedo is obtained randomly from any suitable loot source.
Since Torpedoes inflict only splash damage, kills with a Torpedo will activate Krieg's Blood Bath skill. Conveniently, that skill increases Krieg's gun damage, which will improve subsequent shots with the same Torpedo.