Call of Duty: Modern Warfare ISO SMG Unlock and Attachments Guide

What you need to know about the new ISO SMG.

Season 5 is officially live in Call of Duty: Modern Warfare, and that means a whole lot of new stuff to dive into. Major highlights include several new maps on the Modern Warfare side, and some pretty serious expansion to the Verdansk area for Warzone. But there’s also a new Battle Pass, and that means there are some new weapons to try out. Both the AN-94 assault rifle and ISO submachine gun have made their debuts in Modern Warfare for Season 5, and they both seem like rad weapons. Let’s start with the ISO SMG

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Modern Warfare ISO SMG Unlock and Attachments Guide

Infinity Ward describes the ISO SMG as a tool designed to “control” matches, meaning it’s set up to be a formidable option at close range. It has a high rate of fire and likely doesn’t include a ton of drawbacks, other than needing to get up close to really do damage with it. It seems like the ISM SMG will be especially handy in the new Suldal Harbor map, as that arena’s design is all about tight corners and chokepoints.

Related: How to Inspect Weapons in Call of Duty: Modern Warfare and Warzone

Luckily, getting a hold of the ISO SMG is pretty easy. You don’t even have to pay for the premium version of the Battle Pass. There’s a bit of grinding involved, but you’ll get the scrappy little murder machine once you reach Tier 15 on the Battle Pass. Considering the Battle Pass has 100 Tiers overall, that isn’t a bad first step to reach for a new gun to play around with. And once you get it you can work on tricking it out to your liking. Here are the applicable attachments for the ISO SMG:


  • Flash Guard
  • Tactical Suppressor
  • Muzzle Brake
  • Breacher Device
  • Lightweight Suppressor
  • Compensator
  • Monolithic Suppressor


  • FTAC 225mm Dominator
  • FSS Revolution
  • ISO 140mm CQB
  • FSS Nightshade


  • 1mW Laser
  • 5mW Laser
  • Tac Laser


  • Aim-Op Reflex Sight
  • Corp Combat Holo Sight
  • Operator Reflex Sight
  • Cronen LP945 Mini Reflex
  • VLK 3.0x Optic
  • APX5 Holographic Sight
  • G.I. Mini Reflex
  • Scout Combat Optic
  • Monocle Reflex Sight
  • Solozero NVG Enhanced
  • Viper Reflex Sight
  • PBX Holo 7 Sight
  • 4.0x Flip Hybrid
  • Solozero Optics Mini Reflex
  • Merc Thermal Optic
  • Cronen C480 Pro Optic
  • Thermal Hybrid


  • FORGE TAC Ultralight
  • FORGE TAC Stalker
  • FTAC Vagrant
  • ISO Collapsible


  • Commando Foregrip
  • Merc Foregrip
  • Tactical Foregrip
  • Ranger Foregrip
  • Operator Foregrip


  • 30 Round Mags
  • 50 Round Drums

Rear Grips:

  • FSS Vice ISO Grip
  • FTAC Elite ISO Grip
  • ISO Tac-Form


  • Frangible – Disabling
  • Fast Melee
  • Recon
  • FMJ
  • Frangible – Wounding
  • Mo’ Money
  • Fully Loaded
  • Sleight of Hand
  • Heavy Hitter

If you don’t want to grind, the option to pony up some cash to skip Battle Pass Tiers is available if that’s more your speed. You can get the Battle Pass Bundle, which immediately shoots you up to Tier 20 for an instant ISO SMG unlock. 

How is Season 5 treating you so far? Are you still working towards unlocking the ISO SMG, or do you have it already? Do you like it enough to use it on the reg? Let us know what you think over at the Prima Games Facebook and Twitter channels!


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Lucas White
Lucas plays a lot of videogames. Sometimes he enjoys one. His favs include Dragon Quest, SaGa and Mystery Dungeon. You can find him on Twitter @HokutoNoLucas. Wanna send an email? Shoot it to [email protected].