To make your gear as powerful as possible in S.T.A.L.K.E.R. 2: Heart of Chornobyl, you’ll need hidden blueprints and modules. The game world is vast, and many useful items are hidden in less-than-obvious places.
In this guide, we’ve compiled the exact coordinates for 18 rare upgrades for the best armor (including SEVA and exoskeletons) and top-tier weapons. For easy searching, all caches are divided by Zone region.
Location: Chemical Plant
- Magazine Feed blueprint for the M860 Cracker shotgun: Climb the walkway directly above the central elevator.

- Protective Coating for the Exoskeleton: Look inside the safe located in the military tunnel in the Chemical Plant.

Location: Duga
- Aramid Lining for the PSZ-9D “Dolga” armor: Hidden inside the kindergarten building.

- Lead Container for the SEVA suit: Located on the roof of the Crystal SCS building in the northern part of the Duga region.

Location: Malachite
- Plexiglass suit with steel wire mesh for the PSZ-9I “Sokol”: Found in a bag in the Malachite railway tunnels.

- Large Ammo Box for the RP-74M machine gun: Found on pipes along the wall in the VPC mirror location.

- Return Mechanism Sleeve Tightener for Ram-2: Found in the overhead crane cabin just inside the Brain Scorcher location.

Location: Yantar
- High-Capacity Magazine for Zubr-19 and Integral-A: Both upgrades are located together in a flooded tunnel under the lake.

- Camel Drinking System for the PSZ-9D Duty armor and Extended Magazine for the RP-74M: Found in a secret room near the water, just west of the Yantar production complex.

- Rubber Coating Blueprint for Kharod: Hidden inside a chasm.

Location: Red Forest
- High-Capacity Magazine for the Zubr-19: Found in a bag on a rock in the Witch’s Circle anomaly.

- Sprayed Protective Layer for the Duty Shield exoskeleton: Hidden in a stash behind the fence near the containers. (Note: The armor itself may not currently be in the game due to bugs in the release version.)

- Individual Adjustment Blueprint for the SVU MK3: Found in a dusty loot in the western part of the Red Forest.

Location: Yaniv
- Extra Barrel Rifling for the Dnipro assault rifle: Found in an overturned train car in the area with the conjoined trains in the southwest of Yaniv.

- All Titanium Components for the Brummbar exoskeleton: Found in the locker room at the train station.

- Rubber Stock Rear for the RP-74 machine gun: Found on a stove in a house in the village of Lozove.

Other Region
- High-Capacity Integral-A Magazine: Hidden underground in a bag at the Krug antenna complex in the Burnt Forest.
- Aramid Lining for the Sphere-M20 Helmet: This is a secret stash. You need to find a spatial anomaly in the Rostock location. Jump into it and you’ll be teleported to the Garbage, where the required blueprint will be.
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