Sentinel Firing Core is a key upgrade material in ARC Raiders, and finding enough of them can become a frustrating bottleneck when you're pushing your Gunsmith to its final level. You'll need four cores, but Sentinel spawns are inconsistent, and even a successful kill doesn't always guarantee an easy pickup.
Our team recommends approaching this farm with two options in mind: search Arc Carriers whenever you encounter them, then target known Sentinel spawn locations when you still need more cores. If you're also planning your overall progression and equipment upgrades, our ARC Raiders Items resource can help you keep your farming goals organized. Here's where to look, what we've learned from the available reports, and which risks are worth watching.
How to Get Sentinel Firing Cores
There are two main ways to obtain Sentinel Firing Cores: looting destroyed Sentinel units and searching Arc Carriers. Both are worth considering, but they involve different levels of uncertainty.
| Method | What to Do | Key Consideration |
|---|---|---|
| Destroy a Sentinel | Find the sniper turret, destroy it, and loot its remains | The Sentinel may not spawn, and its remains can be difficult to reach |
| Search an Arc Carrier | Breach the crashed ARC vessel and check its loot | Finding cores this way on two different maps, but provides no overall drop rate. |
If you're already exploring a map and come across an Arc Carrier, checking it is a sensible first step. You don't need to commit an entire raid to hunting a particular enemy, and you may find the material without engaging a Sentinel at all.
If that doesn't finish your collection, focus on locations where Sentinel sightings have been reported or personally observed. Keep in mind that a reported spawn point is not a guaranteed spawn.
Our recommended approach is to check Arc Carriers during regular raids first, then prioritize the Research and Administration Building on Dam Battlegrounds if you still need Sentinel Firing Cores. A reported spawn location is never a guarantee, and you still need to recover the loot after a kill.
Best Sentinel Locations on Dam Battlegrounds
Dam Battlegrounds is the strongest starting point because we identify the Research and Administration Building as the most consistent location they've found.
Research and Administration Building
Start at the staircase on the south side of the building. A Sentinel may appear near the corner, where it can target players from a distance.
Our recommended approach is to use nearby cover and deal with the turret from a protected angle rather than exposing yourself unnecessarily. Once the Sentinel is destroyed, move to its remains and check for the core.
There is one important complication: the Sentinel spawned at a particular position can fall and disappear, leaving no accessible loot. This appears to be a potential recovery problem rather than a reliable farming strategy, so don't assume every successful kill will produce a collectible core.
Bridge-Side Spawn Locations
The original guide also identifies two possible Sentinel locations on opposite sides of the bridge.
These spots are worth checking if you're already nearby, but the author's experience suggests that sightings there were uncommon. They should be treated as secondary opportunities rather than the foundation of a dedicated farming route.
Buried City Sentinel Location
In Buried City, head toward the Town Hall near the center of the map and check the rooftop. The reported Sentinel position is a small arch where a bell would normally be expected.
This location has two practical drawbacks. First, the author encountered the Sentinel infrequently. Second, after being destroyed, the turret may fall onto the sand below the building.
The surrounding area also has a large enemy patrolling nearby, which can make retrieving the remains more dangerous than the actual kill.
If you decide to check this location, plan your approach around both the rooftop encounter and the recovery route. The objective is to leave with the core, not simply to destroy the target.
Spaceport and Blue Gate: Reported Spawn Points
The possible Sentinel locations on Spaceport and Blue Gate.
| Map | Reported Area | Verification Status |
|---|---|---|
| Spaceport | Locations indicated in community reports and the original guide's map footage | Unconfirmed by the author |
| Blue Gate | Above the central checkpoint or near the large antenna in the top-right area of the map | Unconfirmed by the author |
Treat these as leads rather than confirmed farming locations. If you're already running either map, checking the reported areas may be worthwhile. Making a dedicated trip solely for an unverified spawn is harder to justify when other opportunities are available.
Spawn behavior can also change between game versions, so older footage and community reports should be cross-checked against current gameplay before you rely on them. You can consult the official ARC Raiders website for game information and official updates, although a general official page does not independently verify the specific spawn locations listed here.
How to Farm Sentinel Firing Cores More Efficiently
The best approach is to reduce the number of raids spent searching for one specific enemy. Instead of treating Sentinel hunting as your only option, combine opportunistic looting with targeted searches.
- Check Arc Carriers during normal runs. When you encounter a breachable crashed ARC vessel, inspect its loot before moving on. Finds from Arc Carriers are on two different maps, although the actual drop rate remains unknown.
- Prioritize the Dam Battlegrounds building. If you still need cores, check the Research and Administration Building's south staircase area first. This is the author's preferred Sentinel location.
- Inspect nearby alternatives when convenient. The bridge-side locations and Buried City rooftop are possible alternatives, but their reported sightings are less consistent.
- Treat unconfirmed locations as optional detours. Spaceport and Blue Gate may be worth checking when your route already takes you nearby, but don't build your entire plan around an unverified spawn.
- Secure the loot after every kill. Check where the Sentinel's remains landed before leaving. A kill without a successful pickup does not advance your collection.
We would also avoid judging a route by kills alone. A practical farming route should account for travel time, combat exposure, and whether the remains can be looted safely. We don't provide enough data to establish a definitive cores-per-hour ranking, so the recommendations above are based on observed opportunities rather than calculated drop efficiency.
Summary
For Sentinel Firing Cores, start by checking Arc Carriers encountered during your regular raids. If you still need materials, prioritize the Research and Administration Building on Dam Battlegrounds, then consider the bridge-side locations and Buried City rooftop as alternatives.
Spaceport and Blue Gate remain unconfirmed leads, so approach them with realistic expectations. Most importantly, make sure you can recover the Sentinel's remains after a kill. When you're planning the rest of your loadout and progression, ARC Items can serve as an additional reference, but your immediate goal is straightforward: collect the four cores you need without wasting raids on unreliable spawns.
FAQ
How many Sentinel Firing Cores do you need?
The original guide states that you need four Sentinel Firing Cores to upgrade the Gunsmith to its final level.
Can you get Sentinel Firing Cores without killing a Sentinel?
Yes. You can find cores inside Arc Carriers, making them an alternative to hunting Sentinel units. However, it doesn't establish a guaranteed drop rate.
Where should you look for Sentinels first?
The Research and Administration Building on Dam Battlegrounds is the author's preferred starting point, particularly the area near the south-side staircase.
Why might a Sentinel kill fail to produce a core?
The cases where a destroyed Sentinel falls and disappears, preventing the player from looting its remains. Recovery difficulties when a Sentinel falls onto the sand below the Buried City Town Hall.
Are the Spaceport and Blue Gate locations confirmed?
Not by the way. They are reported locations that may be worth checking, but they should not be presented as guaranteed spawns.
