The Stella Montis map in ARC Raiders is full of locked security rooms hiding rare components and late-game upgrades, and the Assembly Admin Key is one of the more confusing ones to place. This quick and easy walkthrough shows you exactly where to take the key, what you’ll find inside, and how to navigate the upper level.
How to Reach the Assembly Admin Door
Travel to the Assembly sector on the northern edge of Stella Montis. The zone has multiple elevation layers, so make sure you’re on the industrial ground level rather than in the tunnels below.

Push forward through the main walkway until you spot a secured maintenance room tucked into the right-side structure. It will ask you to unlock the door with the Stella Montis Assembly Admin Key.

This room is your first key slot. Interact with the lock panel beside the door to gain entry. You can even look through the reinforced window from the outside to confirm you’re in the correct spot. To the left of the window, there are directions on the wall pointing forward with Loading Bay and Medical Research.

Why the Second Door Matters
The first chamber won’t look exciting; it’s just a couple of crates and scattered supplies. But don’t leave just yet. A staircase leads up to a second locked room that uses the same Assembly Admin Key.

Loot drops appear to scale higher on the upper floor. That’s where you’re more likely to score components worth the trip, especially if you’re deep into crafting upgrades. However, the exact loot known to drop is widely unknown since the map is new.
Final Thoughts
Stella Montis can feel like a cold, metal labyrinth the first time you’re out there, but knowing where this key goes turns the Assembly area into easy profit. Those locked rooms hold gear you won’t find lying around in the open, so it’s always worth stopping by once the key drops. Keep checking your keys, search every corner, and don’t leave Stella Montis without claiming what’s hidden behind those steel doors.

162 articles
Hotel Panorama Puzzle Solution in ARC RaidersApr 30, 2026
ARC Raiders: How to Find & Use Dockmaster’s DetectorApr 30, 2026
ARC Raiders: Where to Find Turbine CompressorApr 30, 2026




