How to Get the Jupiter and Equalizer Blueprints in ARC Raiders: Harvester Puzzle and Update 2.3 Drops

The Jupiter and the Equalizer are two of the most sought-after Legendary weapons in ARC Raiders. The Jupiter is a bolt-action energy sniper that punches straight through ARC armor. The Equalizer is a fully automatic experimental beam rifle. Both need a blueprint you won't find in an ordinary loot run.

For a long time the only real source was the Harvester, a puzzle structure guarded by the Queen. Update 2.3 added a second way in. Here's how both routes work, how to solve the Harvester, and what you need to craft the guns once a blueprint drops.

This guide is up to date for Live Update 2.3.0 (live since October 27, 2026) and the follow-up Hotfix 2.4.1 (November 5, 2026), which didn't change these drops.

Quick answer

What changed in Update 2.3

Before 2.3, the Harvester was the go-to source for these blueprints. In Live Update 2.3.0, Embark added the Jupiter and Equalizer to a pool of six blueprints, together with the Dolabra, Bobcat, Tempest and Vulcano, that can now drop in any major map condition. Major conditions include Night Raid, Electromagnetic Storm, Cold Snap and Hurricane. Embark slightly lowered the drop chance of that pool to make up for the wider spread.

In practice, you can find a Jupiter or Equalizer blueprint while looting during a major condition, but it's a lucky bonus, not a farm. If you want a reliable shot, the Harvester is still the way to go.

Requirements

• A Harvester on Dam Battlegrounds, The Spaceport or The Blue Gate. It isn't on the other maps.
• A loadout that can deal with the Queen if things go wrong. You don't have to kill her, but she becomes hostile during the puzzle.
• Enough firepower for twelve targets. Each one takes roughly 100 damage to destroy.
• To craft: a Gunsmith bench at level 3, plus 3 Magnetic Accelerators, 3 Complex Gun Parts and 1 Queen Reactor per weapon.

How to solve the Harvester puzzle

1. Queue for one of the three Harvester maps and head to the Harvester. Watch the Queen's patrol and slip inside when she's moving away from your entry point.
2. Collect three fusion cores. Breach the containers on the Harvester's upper level to find them. One more core spawns on the ground in the center of the Harvester.
3. Insert all three cores into the central pillar. Interact with the base of the pillar to open its chambers and insert the cores. Do it in quick succession, or the sequence won't start.
4. Destroy the twelve yellow targets. Pulsating yellow targets appear around the inside of the Harvester. Shoot every one of them.
5. Loot the center containers. Once the last target breaks, containers open in the middle of the Harvester. They hold one to three blueprints, either Jupiter or Equalizer, along with other loot.
6. Get out alive. The blueprints only count once you extract. The Queen and other Raiders are still a threat on the way out.

The breachable containers on the upper level also drop ARC materials such as ARC Alloy and ARC Circuitry, so empty them on the way.

The Harvester's defenses

The structure fights back while you work:

• Fire Discharge: The Harvester periodically floods itself with fire. A yellow warning light and a warning sound come first, and the exterior vent doors open so you can escape. The discharge also ejects all fusion cores from the pillar, so you have to pick them up and reinsert them.
• Electrical Surge: Once the cores are in, the Queen can trigger an electrical surge. It drains your shield and stuns you briefly, but it can't kill you. The doors don't open before it, so you can't dodge it by leaving.

How to craft the Jupiter and Equalizer

Learn the blueprint, then craft the weapon at a level 3 Gunsmith. Both guns share the same recipe:

The Queen Reactor is the hard part. You get it by scavenging a destroyed Queen or the leg armor segments that get blown off during the fight. So while you don't need to kill the Queen for the blueprint, you'll need to take her on, or at least break her legs, to build the gun.

Tips and common mistakes

• Don't fight the Queen on your first run. Solve the puzzle around her, extract with the blueprints, and come back for Queen Reactors once your squad is better equipped.
• Insert the cores together. The cores have to go in quickly one after another, so gather all three before you touch the pillar.
• Watch for the fire warning. When the yellow light and alarm start, leave through the open vents. Then go back and collect any ejected cores.
• Bring extra ammo. Twelve targets at around 100 damage each adds up, especially if you also have to fend off ARC or other squads.
• Loot during major conditions. Since 2.3, any container in a major condition can roll one of the six blueprints in the pool. Search containers thoroughly on any map with a major condition active.
• Don't sell spare blueprints by reflex. If you get a duplicate, a squadmate may still need it.