Stella Montis is ARC Raiders' endgame map — the smallest, the deadliest, and the one with the highest-value loot in the game. The Assembly Admin Key opens a two-floor vault tucked into the middle of it, and unlike most keys it's only Uncommon, which makes it cheap to find and easy to justify carrying. It won't hand you the best loot in the game, but it reliably beats rummaging through random containers — and on a good run it coughs up epic-rarity gear and weapon blueprints. This breakdown gives you the exact door, the fastest route, and the real loot profile — cross-checked against the ARC Raiders Wiki and the guides that ran it.
Quick answer (TLDR): The Stella Montis Assembly Admin Key is an Uncommon, single-use access key (weight 0.25, sells for 250 Coins) that opens the Assembly Admin door inside Assembly on Stella Montis — on the southeast side of Assembly, west of the Lobby and northeast of the Loading Bay, off the Central Corridor (arcraiders.wiki, shacknews). The door has small "Assembly Admin" text and a green line on the ground in front of it. You get the key from scavenging — best odds in Medical Research on the west side of the map and in residential-style drawers and cabinets. Inside is a two-floor room of drawers, cabinets and monitors with valuable resources and a real shot at epic-rarity items and weapon blueprints (gamerant). Verdict: a cheap, high-floor key worth carrying every Stella Montis run — just go in solo and defend the door.
What is the Assembly Admin Key in ARC Raiders?
The Assembly Admin Key is one of Stella Montis's map-specific access keys — consumable items that open a sealed door, then disappear from your inventory. Per the official wiki, it "unlocks a door in Assembly in Stella Montis" and was added in patch 1.2.0 (arcraiders.wiki).
Here are the verified item-card stats:
| Property | Value |
|---|---|
| Rarity | Uncommon (green) |
| Type | Single-use access key (consumed on use) |
| Weight | 0.25 |
| Vendor value | 250 Coins |
| Stack size | 1 |
| Map | Stella Montis |
| Unlocks | The Assembly Admin room (two floors) |
The standout detail is the rarity: most key rooms are gated behind Rare keys, but the Assembly Admin Key is only Uncommon, so it shows up far more often. Shacknews is honest about the trade-off — "the Assembly Admin Key is uncommon (green), you're not going to find the best loot, but it will give you a better chance at decent gear compared to rummaging through random containers" (shacknews). On the highest-value map in the game, "decent gear behind a cheap key" is a very good deal.
If you're clearing the Stella Montis keyring, this pairs with the Stella Montis Archives Key — same endgame map, same "find the key, find the door" loop. For the full lay of the land, see our Stella Montis guide.
How do you get the Assembly Admin Key?
The key comes only from scavenging — there's no quest hand-out (arcraiders.wiki). To find it efficiently:
- Farm Medical Research (west side of Stella Montis). It's the most reliable hunting ground — strong loot in general, and it throws up keys (including the Assembly Admin Key) when you methodically clear every room (gamerant, dualshockers).
- Search residential-style containers. The key turns up in wooden drawers, cabinets, suitcases and metal drawers — and keys have the highest drop rates in drawers from desks and tables (gamerant). Assembly Workshops is a solid secondary spot.
- Keep it in your safe pocket. Stella Montis is a PvP-heavy endgame map — a key in your safe pocket survives a death, so never carry your only key in your main inventory.
Where is the Assembly Admin door in ARC Raiders?
The Assembly Admin door is inside Assembly, in the upper-central part of Stella Montis. Precisely, it's on the southeast side of Assembly — west of the Lobby and northeast of the Loading Bay, in the hallway (the Central Corridor) that connects those three areas (dualshockers, shacknews). The annotated map up top marks Assembly, the Assembly Line and the Central Corridor.
The door is easy to miss — it has no big sign, just small writing in the upper-left corner reading "Assembly Admin" and a green line on the ground in front of it (dualshockers, shacknews). Note that it sits up by the assembly-line conveyors, not on the lowest floor.
The fastest routes:
- Via the Loading Bay (easiest). The Loading Bay is a large, map-marked area that's central with several paths leading to it — head north through it to reach the corridor (shacknews).
- Via the Assembly Line. Head east along the Assembly Line toward where the ground dips down to the tunnels, go through the door on the south side into the Central Corridor, and the locked door is on your right with the green line on the ground (shacknews).
- Defend the door. Once inside, close the door behind you and drop a Jolt Mine next to it — Stella Montis is brutal for PvP, so going in solo and locking the room down is the safe play (gamerant).
What's behind the door — the loot breakdown
The honest caveat first: like every locked room in ARC Raiders, the exact contents are randomized — anyone promising a guaranteed weapon is guessing. What's consistent is the container set and that the room spans two floors, giving you and a squadmate plenty of spots to clear. Here's the cross-verified layout:
| Container | Where | What you pull |
|---|---|---|
| Wooden & metal drawers | Both floors | Resources, components, mid-value items |
| Cabinets | Both floors | Mixed loot and crafting materials |
| Monitors / lootable computers | Both floors | Electronic items and components |
| Loose valuable resources | Both floors | Crafting mats and trade goods |
Sources: shacknews, gamerant, dualshockers. Because this is Stella Montis — the game's highest-value map — the floor on that loot is better than it looks for an Uncommon key. Gamerant flags valuable resources and even epic-rarity items, with a "high chance of getting rare materials and weapons" across the two floors (gamerant). As a concrete example of the upside, one documented clear pulled a Venator weapon blueprint (dualshockers) — so weapon blueprints are firmly on the table here.
For a 250-Coin Uncommon key that drops frequently, two floors of Stella Montis-tier loot with a real shot at epic items and blueprints is one of the best value rooms on the map.
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Is the Assembly Admin Key worth it?
Yes — it's one of the best value keys on Stella Montis. It's only Uncommon, so you'll find it far more often than the Rare keys, and at 0.25 weight it costs nothing to carry. In return you get a two-floor room of drawers, cabinets and monitors on the highest-value map in the game, with a genuine shot at rare materials, epic-rarity items and weapon blueprints. For a key this cheap and common, that's an easy yes.
The risk is the map, not the room. Stella Montis is a small, PvP-dense endgame zone, and the Assembly Admin door sits in a central corridor between the Lobby and Loading Bay — busy ground. Go in solo, close the door and drop a Jolt Mine behind you, loot both floors fast, and have an extract picked before you commit. Win the room and a frequently-dropped Uncommon key turns into Stella Montis-tier loot.
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FAQ
Where do you use the Stella Montis Assembly Admin Key? On the Assembly Admin door inside Assembly on Stella Montis — southeast of Assembly, west of the Lobby and northeast of the Loading Bay, off the Central Corridor. Look for small "Assembly Admin" text in the door's upper-left corner and a green line on the ground; it sits up by the assembly-line conveyors, not on the lowest floor.
How do you get the Assembly Admin Key? Only from scavenging (no quest reward). The best hunting ground is Medical Research on the west side of Stella Montis — clear every room — and the key turns up most often in residential-style drawers, cabinets and suitcases, especially desk and table drawers. Assembly Workshops is a good secondary spot.
Is the Assembly Admin Key single-use? Yes. It's consumed the moment you open the door, so one key equals one entry. If you die before using it, it's lost with the rest of your carried gear — keep it in a safe pocket.
What loot is in the Assembly Admin room? Randomized loot across two floors: wooden and metal drawers, cabinets, monitors and lootable computers, plus loose valuable resources. On Stella Montis that includes a high chance of rare materials and weapons, and even epic-rarity items — one documented run pulled a Venator weapon blueprint.
Is the Assembly Admin Key worth using? For a frequently-dropped Uncommon key on the highest-value map in the game, absolutely — two floors of Stella Montis loot is excellent value. Just respect the PvP: go solo, lock the door behind you with a Jolt Mine, loot fast, and extract.
How is the Assembly Admin Key different from other Stella Montis keys? It's Uncommon rather than Rare, so it drops more often and is cheaper to use — you trade a slightly lower loot ceiling for far better availability. Per Shacknews, it gives "a better chance at decent gear compared to rummaging through random containers," which on Stella Montis is a strong floor.
