Sunspot is a 
Order Pistol
Elemental Type: None
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How to Unlock The Legendary Sunspot Pistol
Weapons
Legendary Loot
Overview
How to Unlock
Unlock Location:
- Progress through the "Mad Ellie Vault of the Damned" DLC until reaching "Bloodstained Hollow".
- Just North you'll find "The Gurgling Stent" walk through the Bloody Water fall and you'll fight through an onslaught upon defeating all the enemies the boss "Big Oil" will spawn.
Farm Method:
- Defeat "Big Oil".
- After use the Encore Machine nearby to reset the fight.
- Repeatedly defeat "Big Oil" until Sunspot Drops.