Boiler is the title of a group of common submachine guns in Borderlands: The Pre-Sequel. They are manufactured exclusively by Hyperion with old-style materials and prefixes and feature the incendiary-only Maliwan barrel.

Usage & Description

Old-style Hyperion's SMGs have higher damage output at the cost of significantly lower accuracy and fire rate than their modern analogs. They also have a limited version of Hyperion's "reverse recoil" when aimed down the sights only.

The Boiler is part of a subgroup of SMGs that only can spawn with a fixed-element Maliwan barrel. They feature the higher-than-usual elemental damage/second and element chance granted by the Maliwan barrel which can make them excellent choices for combat until a more suitable or more accurate weapon is obtained. These parameters achieve even higher values if the SMG is equipped with a Maliwan grip.


  • Other SMGs in this grouping manufactured by the "old" Hyperion include the Ascerbic (corrosive), Brainstorm (shock), and Fridge (cryo).
  • The Boiler only comes in green or higher rarity.
  • In addition to the Boiler, a variant of this weapon exists as the Backburner, made by the "new" Hyperion.
  • The Boiler is obtained randomly from any suitable loot source.
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