Borderlands 4’s Kaoson SMG Is Pure Mayhem — Here’s How to Get It

This beast of a weapon drops from the Primordial Guardian Origo, a vault boss tucked deep inside the Terminus Range Primordial Vault. And yes, it’s every bit as intense as it sounds.

To even reach Origo, you’ll need to collect three Vault Key Fragments scattered across the Terminus Range:

• One’s hiding in a cave east of The Goredello.
• Another’s locked in a control room inside the Vestral Garrison.
• The last fragment waits in a cave at Cuspid Climb, accessible after you’ve captured the Reliquary Silo.

Once you’ve got all three, head to The Low Leys and find the vault entrance buried in a cave. That’s where the real fun begins.

Surviving the Vault Gauntlet

Opening the vault is just the start. Inside, you’ll face a three-phase gauntlet designed to break you. Waves of enemies, environmental hazards, and puzzles that’ll make you question your build choices — it’s all here.

Stay mobile. Use your abilities wisely. And don’t get cocky — each phase ramps up the difficulty, and the final stretch is pure chaos.

Then comes Origo.

This boss is a nightmare wrapped in wings. It swaps between Incendiary and Cryo damage, so you’ll need to adjust your tactics constantly. Watch its crest: red means fire’s coming, blue means it’s about to freeze your soul. Origo also throws out AoE attacks and wing slams that can flatten you if you’re not paying attention.

The first time I faced Origo, I barely made it. I was low on ammo, running on fumes, and one hit away from a respawn. But when it finally dropped — and I saw that glorious orange glow — I knew the grind was worth it.

Pro tip: Once you’ve beaten Origo, you can use Moxxie’s Encore Machine to refight it without slogging through the entire vault again. Bless that machine.

Why the Kaoson Is Pure Borderlands Bliss

So, what makes Kaoson so ridiculously fun?

• Sticky Projectiles: Fire sticky rounds that latch onto enemies and surfaces. When you reload or switch modes, they all explode in a chain reaction. It’s like setting a trap and watching the fireworks go off.
• Tracking Grenades: The alternate mode fires grenades that home in on targets. Perfect for airborne enemies or those annoying runners who think they can escape.

And yes — it drops in elemental variants: shock, Incendiary, Cryo, Kinetic. You can farm for the perfect flavor to match your build and melt whatever stands in your way.

Whether you’re a min-maxing build crafter or just someone who likes watching things explode, the Kaoson is a must-have. It’s not just a gun. It’s a celebration of chaos.

Final Thoughts

Borderlands 4 is all about embracing the madness, and the Kaoson is the perfect weapon to do it with. It’s loud, it’s lethal, and it turns every fight into a highlight reel. If you’re ready to feel like a true Vault Hunter — the kind that walks into a firefight and walks out with everything on fire — get the Kaoson. Happy hunting, and may your reloads always end in explosions.

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