You can’t wear a Medium Shield in ARC Raiders until your augment supports it.

The Core Reason

Medium Shields are locked behind specific loadout augments, not character level.

  • Light Shields work with your starter augments (Free Loadout, Looting), so they equip fine.
  • Medium Shields only work if you’re using a Combat or Tactical augment (e.g., Combat MK1, Tactical MK1), so the slot stays greyed out or unequippable without them.

Think of it like this: your augment “tells” the game which shield tiers your Raider is allowed to use.

Quick Fix: Step‑by‑Step

  1. Go to Lance at the Clinic/Raider Den.
  1. Craft or purchase one of these augments:
    • Combat MK1 or
    • Tactical MK1.
  1. Use the Loadout Station and equip that new augment in your slot.
  1. Once that augment is active, your Medium Shield slot unlocks and you can equip your Medium Shield.

If the slot is still greyed out, you’re probably still using a Free Loadout or Looting augment, which only allow Light Shields.

Why the Game Does This

  • Shields are tied to augments so the game can separate looting/support builds (fast, Light Shields) from combat builds (tougher, Medium/Heavy Shields).
  • Medium Shields give noticeably better mitigation (around mid‑40% damage reduction) with only a small movement penalty (~5%), so the devs gate them behind combat augments.

An example: if you’re running a loot‑focused build with a Free Loadout augment, you move faster but are locked to Light Shields; swap to Combat MK1 before a raid and suddenly your Medium Shield becomes available.

Medium vs Light vs Heavy (for context)

Here’s a simple view of how the shield tiers differ.

Shield type Damage mitigation Movement penalty Compatible augments Use case
Light Shield About 40% None Almost all, including Free Loadout & Looting Fast looting, scouting, high mobility
Medium Shield About 42–45% ≈5% Combat/Tactical augments like Combat MK1, Tactical MK1 Balanced combat, decent tankiness with okay speed
Heavy Shield Roughly 50%+ Big penalty (around 15%) Higher‑tier Raider/Combat augments Tank builds, low mobility, high survivability

Extra checks if it still won’t equip

If you’ve done the above and still can’t wear your Medium Shield, quickly verify:

  • You actually equipped the Combat/Tactical augment (not just crafted it).
  • You didn’t forget to switch back from a Looting/Free Loadout augment before starting your run.
  • You’re not in a special test/server environment with restricted equipment options.

If you tell me your current augment name and what you see on the shield slot (e.g., “greyed out, lock icon, message text”), I can help pinpoint the exact blocker.

Information gathered from public forums or data available on the internet and portrayed here.