Borderlands 4 Aching Roil Review — Legendary SMG
| Rarity | Legendary |
|---|---|
| Type | SMG |
| Manufacturer | Ripper |
| Element | Fire |
| Drop source | How Rush Saved Mercenary Day Bounty Pack (Vault Card #1) |
Red Text
Sleep down in the soil.
This review was machine-translated from the Japanese original. Numbers are checked against the original; if the wording reads oddly, the Japanese version is authoritative.
‘The more you shoot, the more heat builds up’ heat-management type Ripper-made charge SMG. After charging, it fires linear projectiles in full-auto. Since it becomes unable to fire when Overheat, a playstyle that runs it while venting heat with its dedicated cooling mode is required for this one weapon.
🧩 Red text source On Fandom, this weapon is registered as “Roil” (“Aching Roil” is the notation on Lootlemon / Mobalytics – same red text / same effect), and the red text “Sleep down in the soil.” is said to be a quote from The Mighty Mighty Bosstones song “Royal Oil” (Borderlands Wiki Trivia). “Roil” (boiling) ↔ a wordplay with “Royal Oil”. The additional source for the specific name Aching Roil is (unverified).
What kind of SMG? (Beginner’s perspective)
- Ripper-made SMG. It gets a light charge before firing, and shoots linear projectiles in full-auto
- When firing continuously, heat (heat) builds up, and exceeding the limit Overheats and becomes unable to fire
- Switching to its unique cooling firing mode lets you vent about 40% of heat = the correct usage is to continue firing while switching modes
- Designed to work with CoV-approved magazines (infinite ammo but break from heat)
Unique effects (mechanics)
Hydropower (Hydropower): Overheat stops firing. Mode switching reduces heat.
- In-game: Hydropower — becomes unable to fire when Overheat. Mode switching reduces heat
- Web (Lootlemon): After charging, fires Bullets in a linear trajectory, dealing Kinetic Splash Gun Damage. Using its unique Reduce Heat Firing Mode reduces ≈40% Heat. It still dissipates Heat passively. Overheating disables Reduce Heat and firing without causing an automatic repair.
- Always comes with CoV-approved magazine (infinite ammo, but breaks from heat) (MentalMars)
- Weakness: neglecting heat management causes firepower to stop completely with Overheat = mastering the cooling mode is everything
Drop farming
| Drop Source | Probability | Notes |
|---|---|---|
| Vault Card: Mercenary Day (10 ticket slot) | (unverified) | How Rush Saved Mercenary Day Bounty Pack ownership required |
Summary
- Heat management (cooling mode switching) is essential for the Ripper-made charge SMG
- Good synergy with CoV-approved magazine (infinite ammo, heat damage)
- Obtained via How Rush Saved Mercenary Day Bounty Pack (Vault Card #1)
- Red text quotes The Mighty Mighty Bosstones “Royal Oil”
Related
- Same category (SMG·Ripper): Hellfire
- Reference: Lootlemon - Aching Roil / MentalMars - Aching Roil / Fandom - Roil
FAQ
What is Aching Roil's unique effect?
After charging, it fires a straight projectile that deals kinetic splash damage. Its dedicated heat‑dissipation firing mode reduces heat by about 40%. In Overheat, the heat‑dissipation mode and firing are temporarily paused (no auto‑repair).
Where can you obtain Aching Roil?
It drops from the How Rush Saved Mercenary Day Bounty Pack (Vault Card #1).