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Getting weapons attachments is an important part of the end-game grind, allowing you to fine-tune your guns for accuracy, stability, or to mitigate range damage fall off. When you reach the end game, you’ll find many legendary quality attachments scattered around the world barred by some fairly innocuous mini puzzles. One of those is the Tactical SR mag, which is a magazine modifier for sniper rifles. This attachment gives you +15 reload speed and +7 mobility. Here’s how to get the Tactical SR mag in Once Human.

Tactical SR mag location in Once Human
To get the Tactical SR location, you’ll need to visit the Blackheart region in the very north of the map. Here are instructions on what to do before venturing out:
- Place a waypoint at coordinates 5874, 1287, a spot located along two main roads near oil attack objectives.
- Bring a grenade with you.
- On arrival at the coordinates, throw your grenade at the strange glowing rock.
- The rock smashes on explosion and reveals a lootable crate.
- Loot the crate to get the Tactical SR Mag, 2000 Energy Links, 6 Stellar Planula, and one Controller.
You can now equip the magazine attachment to any of your sniper rifles. If you’re looking for other legendary attachments, there are a few nearby such as the following:
- Tactical Holographic – 6819, 1860
- Large LMG drum mag – 5224, 734
- Forward Flash Hider – 4772, 1480
Remember that the Stellar Planula can be traded at the morphic crate vendor in settlements. You can buy plenty of other attachments from him, too, helping to round out your build if needed. For more attachment guides feel free to check out our guide on the tactical laser sight and other attachments.