The KVD Boom Boom has officially entered its prime in Once Human, proving itself as the top-tier, versatile burn weapon that can turn even the tankiest elites into ash. But despite its destructive potential, many players are using the mods incorrectly, leaving tons of untapped power on the table. This guide will break down the correct way to set up the weapon, which mods and gear you need, and how to unleash explosive damage that can carry you through any challenge with ease.

Why Use the KVD Boom Boom?

This weapon isn’t just powerful—it’s forgiving. You don’t need to aim for headshots or line up perfect shots. The Boom Boom delivers massive area-of-effect (AoE) damage that’s more than enough to one-shot normal enemies and seriously wound elites. When paired with the Pyro Dino, the synergy becomes absolutely devastating. The Dino’s attack amplifies your explosion damage, allowing you to delete elite enemies with a single well-timed shot.

Even without the Dino, the KVD Boom Boom is highly effective for general mob clearing. Most of the gear used in this setup is just 1-star quality, making the build easy to replicate. Higher star gear increases your PSI, which directly boosts burn damage thanks to how PSI density scales.

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Gear Loadout & Mods

• Armor Setup: 4 Shelter pieces and either 1 Safier or 1 Wall piece—both work well, so pick based on what stats roll best.
• Key Gear: Barbecue Glove – this is essential for enhancing your burn output.
• Calibration: If you have Rapid, great. If not, no worries—Stability works just fine since Boom Boom’s main damage comes from its explosion cooldown, not sustained fire.

Secondary Weapon & Flame Mod

Your offhand weapon can be either Wildfire or Bingo. They’re both solid options and flexible depending on your playstyle. The must-have mod for the Boom Boom is Flame Resonance. This keeps your burn damage focused and continuous, especially effective against tanky boss fights.

Full Mod Setup by Gear Slot

• Helmet: Def Expert with elemental attributes
• Mask: Bless Amplifier with good Talent effects
• Gloves: Elemental Overload or Status Enhancement (whichever has better substats)
• Shoes: Covered Advance
• Top (Torso): Quick Back — solves the LMG’s painfully slow reload by letting you use an activator instead
• Pants: Reload Rampage — forget Precision Charge. It only gives a short 24% damage buff for 10 seconds and doesn’t trigger with activator reloads. Reload Rampage gives a permanent 10% status damage boost after just one kill and sticks even after switching weapons.

Reload Rampage also pairs incredibly well with Shelter gear, which loses stacks on manual reloads. With Quick Back, you never manually reload, so you maintain full Shelter stacks and your damage output.

Maintaining Buffs Made Easy

You don’t need to overthink ammo management. Just empty your magazine as usual, and when you’re out, hit the activator. The bonus from Reload Rampage stays intact, and you never need to manually reload. Even a rabbit or cube enemy can trigger the damage bonus. Once active, your status and melee damage each increase by 10%, and the buff persists until a manual reload.

How to Use the Boom Boom Effectively

The real power of this weapon lies in the explosive burst damage, not just spraying bullets. Follow this simple rotation for elite enemies:

1. Release your Pyro Dino onto the target.
2. Wait for the Dino to land its attack.
3. Fire your Boom Boom immediately after — the explosive damage is enough to one-shot most elites.
4. Pull back the Dino if needed — the damage buff lasts a few seconds.

Normal enemies don’t require the setup. A single Boom Boom shot will usually clear them out.

This is what makes the Boom Boom a lazy weapon—it does the hard work for you. There’s no need to aim carefully, and you get massive results with minimal effort.

Recommended Food, Drink & Cosmetics

• Food Buff: Hearty Meat Steel — boosts survivability and energy regen
• Drink: Whimsical Drink — complements the build with added utility
• Mask Skin: Dream Rabbit or Golden Wool — both work great, pick whichever you like
• Cradle: Use what you’re comfortable with, based on your stat focus

Final Thoughts

The KVD Boom Boom isn’t just a flashy weapon—it’s a powerhouse when built properly. Between its high PSI burn scaling, massive AoE potential, and synergy with the Pyro Dino, it can trivialize even high-level content. Equip the right mods, prioritize reload rampage over short-term buffs, and avoid manual reloads entirely with Quick Back. Once you do, you’ll unlock a build that’s deadly, effortless, and fun to use.

Practice the rotation, optimize your loadout, and soon you’ll be melting through Once Human’s toughest enemies without breaking a sweat. The burn meta is here—and it’s hot.