The "AKM-9B" Assault Rifle is one of the unique weapons added in Stalker 2: Cost of Hope DLC that players can get from the Iron Forest region. It's one of the best unique ARs in the game that comes with a silencer and underbarrel launcher modifications. This weapon can be acquired early on in the DLC, but you'll need to solve a puzzle to acquire it.
To get the unique "AKM-9B" Assault Rifle in Stalker 2: Cost of Hope DLC, players will need to visit the unmarked building to the east of SWYD-West Checkpoint. It's located in the southwest corner of the Iron Forest region.
After arriving at the location, you'll need to break the padlock on the door to open it. You can use the knife or a firearm to do so.
Once you get inside, you'll spot a blue safe inside a structure to the right with a keypad. The safe or the keypad won't be interactive until you switch on the power. To do so, head to the west side of the room and vault over the racks to find a small tunnel.
Heading through the tunnel, you'll enter a control room where you can pull the lever to turn on the power.
The keypad code for the safe can be found inside this room, on the server rack left of the control panel.
Now, exit the control room, and you'll notice that the path to the safe is now electrified. Instead of going through the electrical current and receiving damage, break the boxes in the server racks to the right and go through them. Get on top of the nearby rack and shoot the metal sheet to unblock the path leading to the safe.
The safe code for the safe near the SWYD-West Checkpoint is 3546.
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