Where to Find the Sentinel Firing Core in ARC Raiders

Looking for where to find the Sentinel Firing Core in ARC Raiders? This rare ARC component drops almost exclusively from Sentinel turrets, and you'll need a steady supply to upgrade your Gunsmith. Below you'll find the two ways to get the core, the best farming map, every reliable Sentinel location, and the safest way to take a turret down.

What you need to know first

The Sentinel Firing Core is a high-tier crafting material used to level up your Gunsmith back at base. There are only two sources for it: destroying ARC Sentinels (the stationary twin-barrel turrets) and looting ARC Couriers, which carry one only on a small chance. Because Sentinels sit in fixed spots, the most efficient approach is to learn their spawns and run a loop. Before you head out, pack a hard-hitting or armor-piercing weapon and, if you can, a few grenades for the turret's weak point.

How to find and farm the Sentinel Firing Core

1. Step 1: Understand the item and its two sources

   The core has just two origins. Killing an ARC Sentinel and looting the wreck is the dependable method — every downed Sentinel can yield one. ARC Couriers are the bonus method: scoop them up whenever you pass one, but treat any core you find there as luck rather than a plan. Everything else in this guide focuses on Sentinels, because they are your main supply.

   

2. Step 2: Farm Dam Battlegrounds, the best map

   Dam Battlegrounds is the most efficient place to farm cores because it packs the highest number of Sentinel spawns into a short route. Check the south / R&D staircase near the main building first, then sweep along the dam wall, where a Sentinel typically watches the path between The Breach and Pipeline Tower. There's also one positioned to overlook the Hydroponic Dome Complex. Run these in a loop and the cores add up quickly.

   

3. Step 3: Check the towers on the other maps

   If Dam Battlegrounds is contested, Sentinels appear on other maps too. On Spaceport, look to the Control Tower, where a Sentinel guards the upper level. In Buried City, Sentinels perch on the old bell towers. Dam Battlegrounds also hides extra turrets in its own Control Tower and behind a locked door inside it, so a thorough sweep there pays off.

   

4. Step 4: Take the Sentinel down safely

   Sentinels rotate slowly and track poorly, so approach from the side or rear rather than walking into the front, where its scanner converges into orange targeting lasers. Aim for the yellow canister on its arm — that's the weak point. Burst it with a piercing or heavy weapon, or throw a grenade at the back for a fast kill. As soon as you see the lasers lining up, duck behind cover and reposition.

   

5. Step 5: Loot the wreck and upgrade your Gunsmith

   Once the Sentinel is destroyed, walk up to the wreck and hold the interact button to loot it. Pull out the Sentinel Firing Core along with any other salvage. Back at base, open the Gunsmith and spend your cores — along with the other listed components — to unlock the next upgrade tier and better weapon crafting.

   

Tips for faster farming

• Run a fixed loop. Because Sentinels spawn in set spots, memorizing the Dam Battlegrounds path lets you clear three or more turrets per raid without backtracking.
• Bring the right gun. Piercing and heavy weapons crack the yellow canister in fewer hits, so you spend less time exposed.
• Grenades to the back. A grenade or blast charge thrown behind a Sentinel is one of the quickest ways to drop it.
• Grab every Courier. Looting ARC Couriers along the way costs little time and occasionally hands you a free core.
• Watch for other Raiders. Towers are obvious landmarks, so expect company near popular Sentinel spawns and clear the area before you commit.

Troubleshooting

The Sentinel keeps killing me before I get close

You're probably in its front arc. Break line of sight, circle around to the side or rear using cover, and only peek out to fire on the yellow canister. Retreat the moment the orange lasers start converging.

I destroyed a Sentinel but got no core

Make sure you fully looted the wreck — hold the interact button rather than tapping it, and check every slot. Drops are not guaranteed every single time, so keep running the loop and the cores will come.

I can't find any Sentinels on my map

Not every map is equal for farming. Switch to Dam Battlegrounds for the most spawns, or check the Control Towers on Spaceport and the bell towers in Buried City.

Frequently asked questions

Where is the best place to farm the Sentinel Firing Core in ARC Raiders?

Dam Battlegrounds is the best map. It has the most Sentinel spawns close together — the R&D staircase, the dam wall, and the Hydroponic Dome overlook — so you can run them as a quick loop.

How do you get Sentinel Firing Cores?

There are only two ways: destroy ARC Sentinels and loot their wreck, or loot ARC Couriers, which carry a core on a small chance. Killing Sentinels is by far the more reliable source.

What is the Sentinel's weak point?

The yellow canister mounted on the Sentinel's arm is the weak point. Hit it from the side or rear with a piercing or heavy weapon, or with a grenade, to bring the turret down fast.

What is the Sentinel Firing Core used for?

It's a crafting material used to upgrade your Gunsmith, which improves your weapon crafting and modification options back at base.

Can I get the core from ARC Couriers?

Yes, but only sometimes. Couriers have a small chance to contain a Sentinel Firing Core, so loot them when convenient but don't rely on them.

Final thoughts

Finding the Sentinel Firing Core in ARC Raiders comes down to hunting Sentinel turrets efficiently. Learn the Dam Battlegrounds loop, keep the Spaceport and Buried City towers in mind as backups, flank each turret to burst its yellow weak point, and loot the wreck. Do that on repeat and you'll have all the cores you need to keep your Gunsmith climbing. For official details and updates, see the official ARC Raiders website.