Best ISO Loadout & Attachments for Call of Duty Warzone

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The ISO SMG hardly ever features in the loadouts of Warzone players despite the weapon possessing many desirable qualities. Featuring a fast rate of fire along with impressive mobility, the SMG is certainly an unorthodox choice to go with when it comes to building the best loadout.

Despite its low popularity, it can still pack a punch, especially in close-quarters engagements where it often comes into its element. With Raven Software applying widespread changes to the entire weapon arsenal, could the ISO have its moment to shine in Season 1 of Warzone Pacific?


In this guide, find the best attachments to use on the ISO as well as the best loadout!

Read More: Warzone Pacific Season 1 Patch Notes: All Weapons, Gameplay Changes, Caldera Map & More

ISO SMG Warzone Loadout

Primary Weapon


The ISO SMG handles similarly to the MP5. You'll want to try and stick to similar attachments as the MP5 in order to maximise performance on the streets of Verdansk and Rebirth Island.

ISO SMG Warzone Best Attachments

The attachments you'll want to use are:

  • FSS Nightshade (Barrel)
  • ISO Collapsible (Stock)
  • 50 Round Drums (Ammunition)
  • Merc Foregrip (Underbarrel)
  • Tac Laser (Laser)

One benefit you'll get from the ISO over the MP5 is the 50 round mags. Although the difference is only 5 bullets, this can make a huge difference in those clutch situations.


It'll be interesting to see whether the ISO is accepted into the meta after so many players have avoided using it for so long.

ISO SMG Warzone Best Class

Secondary Weapon


The Kar98k is considered one of the best long-range weapons right now due to its incredible mobility and unmatched damage at longer distances.

The attachments you'll want to use are:

  • Monolithic Suppressor (Muzzle)
  • Singuard Custom 27.6"
  • FTAC Sport Comb (Stock)
  • Tac Laser (Laser)
  • Variable Zoom Scope (Optic)

This setup allows you to take on enemies at long-range with high damage. However, due to the Kar's snappy sights, you can also dominate at medium range.

You can also use other weapons with the ISO, such as the Bruen, M4A1 and AN-94. As long as you have a long-range option you've got a pretty solid class.



If you're playing Warzone you'll want to bring C4. This allows you to not only clear buildings with ease, but also take out multiple vehicles during the match.

If you're planning on getting aggressive with this class, a Frag Grenade would also be a good choice, as you can easily clear rooms and small areas.



You'll want to equip the Heartbeat Sensor with this class. This allows you to clear large areas at once without the need to search every room.

This can also give you a great advantage when paired with flash grenades. You can ensure the flash will hit the player in the next room by calling out the location of the enemy to your team. 


The perks you'll want to equip are:

  • Cold Blooded (Perk 1)
  • Overkill (Perk 2)
  • Tracker (Perk 3)

These perks allow you to clear buildings easily, without being caught out by campers. Unfortunately, you'll need Overkill with this class as you need two primary weapons.


If you choose this class, we recommend you also make another class with Ghost as the second perk, so you can move around the map without worrying about UAVs.