Universal Ammo Expansion locations

All of Samus' new beam weapons harness Universal Ammo to discharge rounds of deadly ordnance. A whopping 12 UA Expansions await your discovery, ultimately granting Samus up to 400 rounds of maximum ammo (each one grants an extra 30 ammo). You'll be needing these if you want to make full use of that impressive new arsenal.

Samus' weapons | Missile locations | Universal Ammo Expansion locations
Energy Tank locations | Artifact locations

Celestial Archives

1. (Celestial Gateway)
Once the Battlehammer is yours, return to the Celestial Archives and hop off your ship. Look for an opening below the platform your ship hovers above. See the green force field blocking access to a hole in the floor? Use the Battlehammer to open it up then roll through and fall below. Look for this UA Expansion hiding among the thick pillars below.

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2. (Data Shrine 02)
The Battlehammer's needed to score this one. Once you've secured it, head to the Data Shrine 02 area to find the central region sealed off by four green blast-shielded doors. Breach one with the Battlehammer and step inside to face two pesky Guardians. Defeat both and claim your prize in the center of the chamber.

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3. (Transfer Lock)
As you teleport to the Transfer Lock via the Synergy Core, drop off the platform and look for a Voldrum-spawning unit on the far end of this narrow chamber. Destroy the unit (along with any pesky Voldrums), you'll then find this expansion right beside the spawning unit's former position.

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4. (Docking Bay)
Way out above the abyss in the Docking Bay, you'll discover this UA Expansion waiting patiently atop one of the floating platforms. From the upper bridge, take the second moving platform from the left to be taken straight to your prize.

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Alinos

1. (Magma Drop)
You'll need the Judicator and a boat-load of Energy Tanks to locate this one safely. Travel to the High Ground area in Alinos and look for a small opening in the floor blocked by a purple force field down in the underground tunnels. Disable the field with the Judicator and drop into the lava with the Morph Ball active.

You'll now find yourself at the top of a huge magma chasm. Without the Gravity Suit Samus will continually take damage so you'll need to move fast. Travel down as far as you can, snagging all the energy refills along the way to survive the hot swim. At the base of the shaft travel right and bomb-jump yourself up the next shaft.

Morph Ball Bombs propel Samus incredibly high here, just hug a wall if you start to fall and stick to it while laying bombs to propel yourself higher. Eventually you'll spot this UA Expansion resting atop a ledge near the top of the shaft. Grab it and quickly bomb-jump your way up the exit tube above.

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2. (Processor Core)
You'll need the Magmaul to eventually track this one down. Right after securing the Attameter and Cartograph artifacts, exit the Council Chamber via the upper door (near the Attameter Artifact's alcove). Head down the corridor to locate the Processor Core. Leap across the gap to the platform ahead of you, then jump across to the left side of the ledge on the wall opposite. Straight ahead lies this UA Expansion.

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Vesper Defense Outpost

1. (Compression Chamber)
This UA Expansion rests inside the base of a column on the lower level of this area. But a force field protects it, so you'll need to find the switch to deactivate it first. From the Cortex CPU chamber, roll through the perpendicular tunnel leading out of the room near Missile VD.01.

Once in the upper floor of the Compression Chamber, disable the green force fields with the Battlehammer and clear out the enemies you find beyond. With the area clear, look for two force field switches here, one disables the field protecting the UA Expansion, while the other opens up your next path near the base of the column. Work your way back down via the Cortex CPU to claim your prize.

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2. (Stasis Bunker)
As soon as you've picked up the Shield Key needed to access the Cartograph Artifact in the Stasis Bunker area, jump atop the ledge on the left or right of the chamber and look around the opposite side of the exhaust pipe (the one spouting fumes periodically below). Jump across to grab the expansion from its hidden ledge.

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Arcterra

1. (Ice Hive)
Right after you've scored the Judicator, disable the nearby purple force field with your new toy. Cross the ice bridge beyond and turn right at the end. See that small purple force field across the gap? Take it out with the Judicator and leap across to the alcove inside. Right beside you inside lies this UA Expansion.

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2. (Ice Hive)
Upon securing the previous expansion above, go back down to the open chamber where the vault door lives. See the UA Expansion right behind the purple force field along the wall? Take out the field with the Judicator and step inside to claim your prize.

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3. (Sanctorus)
After securing the Imperialist and the Attameter Artifact, open the red blast shielded-door in the Fault Line area and travel to the Frost Labyrinth. Make your way to the top of this region and open the red blast shielded-door there with your new toy. Beyond lies the Sanctorus, simply walk around the left side of the circular path to find this item waiting there.

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4. (Drip Moat)
After securing the Imperialist, scan the ship deck teleporter control switch inside the area above blocked by a force field and travel back to the Arcterra Gateway. Teleport inside the force field area and use the jump pad ahead to exit this area. Beyond is the Drip Moat, a long winding tunnel. This item rests just below the platform you ride through the tunnel atop, either jump over the platform and grab it or pick it up on your way back. Use the jump pad below to propel yourself up if you miss it in the drop.

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