Complete Guide to Finding Sentinel Firing Cores in Arc Raiders

If you’ve been exploring the dangerous world of Arc Raiders, you’ve probably realized that human players aren’t your only problem. The ARC machines roaming the battlegrounds can absolutely shred you if you’re not careful—and among them, Sentinels are some of the deadliest turrets you’ll encounter.

But here’s the silver lining: taking down these mechanical nightmares rewards you with Sentinel Firing Cores, a crucial recyclable material you’ll need to upgrade your Gunsmith Station to Level 3. If you’re serious about upgrading your weapons and progressing through the game, you’ll need to hunt these down.

Let me walk you through everything you need to know about finding, fighting, and farming Sentinel Firing Cores.

What Are Sentinel Firing Cores?

Sentinel Firing Cores are rare recyclable items dropped exclusively by Sentinels—the beefed-up, heavy-hitting turret variants scattered across various maps. Unlike regular turrets that pepper you with rapid fire, Sentinels take their time. They charge up for a few seconds before unleashing a devastating single shot that can strip your shields and leave you clinging to life.

Think of them as the snipers of the ARC machine world. One clean hit, and you’re in serious trouble.

Where to Find Sentinels

Finding Sentinels can be hit-or-miss since other players often destroy them before you arrive. However, certain locations have higher spawn rates. Here are some reliable spots to check:

Dam Battlegrounds

One of the earliest and most consistent locations is near the Research & Administration building in Dam Battlegrounds. Look for the blue stairs—there’s typically a Sentinel perched at the top. This is a solid spot for newer players who are just starting to farm materials and upgrade their gear.

If you’re exploring Dam Battlegrounds, you might also want to grab the Dam Surveillance Key for extra loot opportunities.

Blue Gate Map

Blue Gate is another excellent farming location with multiple potential Sentinel spawns:

• Pilgrim’s Peak: Check the roof of the main building—Sentinels love elevated positions here
• Headhouse (via Outer Gates): Enter through the Outer Gates and search inside the Headhouse structure

Pro tip: Since Sentinels are relatively rare and other Raiders may have already destroyed them, consider server hopping or checking these locations across multiple raids to maximize your chances.

How to Defeat Sentinels Safely

Sentinels hit like a freight train, so running at them guns blazing is a recipe for disaster. Here’s how to take them down without becoming scrap metal yourself:

Combat Strategy

Find cover first: Before engaging, position yourself near solid cover—walls, rocks, vehicles, anything that blocks line of sight. Sentinels need a few seconds to charge their shot, giving you time to peek out, fire, and duck back to safety.

Use hit-and-run tactics: Pop out from cover, land a few shots, then immediately retreat before the Sentinel fires. Repeat this process until it explodes. Patience is key here—rushing will get you killed.

Watch your positioning: If you’re fighting from an elevated position (rooftops, cliffs, etc.), be aware that when the Sentinel explodes, its remains will tumble all the way down. You’ll need to retrieve the loot from wherever it lands, and falling damage is very real in Arc Raiders, so don’t follow it down carelessly.

Bring appropriate firepower: While any weapon can technically work, medium to long-range weapons excel here since you’ll be playing peek-a-boo with cover. Make sure you’ve got your weapons properly upgraded beforehand.

Looting and Recycling Sentinel Firing Cores

Once you’ve blown up a Sentinel, approach the wreckage and loot it to collect your Sentinel Firing Core. Now you have two options:

Keep It for Upgrades

If you’re working toward upgrading your Gunsmith Station to Level 3, hold onto these cores. They’re essential for that upgrade and will significantly improve your weapon modification capabilities.

Recycle for Materials

If you recycle a Sentinel Firing Core at your workbench, you’ll receive:

• 2x ARC Alloys
• 3x Mechanical Components

Both materials are incredibly useful for crafting equipment and other upgrades throughout the game. If you’re swimming in Sentinel Firing Cores (lucky you!), recycling extras can provide a steady supply of these valuable resources.

Additional Farming Tips

Competition is real: Since Sentinels are relatively rare spawns and drop valuable loot, expect competition from other players. Getting to known spawn locations quickly after entering a raid increases your chances.

Know your extraction routes: Once you’ve secured your Sentinel Firing Core, you need to extract safely with it. Consider using Safe Pockets to protect valuable items if you’re worried about dying before extraction.

Complete related quests: While hunting Sentinels, you can knock out other objectives like finding Snitch Scanners or completing the Marked for Death quest.

Level up efficiently: Taking down tough enemies like Sentinels contributes to your overall progression. Check out our max level XP farming guide to optimize your leveling strategy.

Why You Need Sentinel Firing Cores

Beyond the immediate satisfaction of destroying a deadly turret, Sentinel Firing Cores serve a critical purpose in your progression. The Gunsmith Station Level 3 upgrade opens up advanced weapon modifications that can make the difference between barely surviving and dominating raids.

Given how dangerous Arc Raiders can be—both the machines and other players—having top-tier weapons isn’t just nice to have, it’s essential for long-term success.

Final Thoughts

Farming Sentinel Firing Cores requires patience, strategy, and a bit of luck with spawn locations. These aren’t items you’ll stumble across constantly, so when you find a Sentinel, make the encounter count. Use proper cover, take your time with the fight, and secure that loot before another Raider beats you to it.

Whether you’re upgrading your Gunsmith or recycling for valuable materials, Sentinel Firing Cores are worth the effort. Just remember: those charged shots hurt, so respect the machine and fight smart.

Ready to dive in? You can grab Arc Raiders on PlayStation, Xbox, or check out more details on the official website. For more survival tips, don’t miss our best tips and tricks guide and best skills to unlock early.

Happy hunting, Raiders!