The best ISO 45 loadout in Warzone

The Call of Duty: Warzone meta shifts like the seasons, which makes sense because new seasons always bring new guns with them in the live-service FPS title.

Warzone’s massive roster of guns grew by a couple yet again in season four this past June, and one of the new guns to join the game in the summer of 2023 is the ISO 45, which is a returning weapon from Modern Warfare 2019.

Among the myriad of SMG options in Warzone, it’s important to consider the situations you will be using them. In most cases, SMGs are best for close-range engagements, and this is true for the ISO 45 because that’s exactly where its strength lies.

Here’s the best ISO 45 build in Warzone to use in battle royale or Resurgence.

Best ISO 45 loadout in Warzone

• Barrel: 7″ EX Raptor-V2
  • Recoil Steadiness: +0.50 lb
  • Aim Down Sight Speed: -0.40 in
• Laser: VLK LZR 7MW
  • Sprint to Fire Speed: -0.50 oz
  • Aim Down Sight Speed: -51.00 ft
• Stock: Demo Fade TAC
  • Aim Down Sight Speed: -4.00 oz
  • Aiming Idle Stability: -2.40 in
• Magazine: 45 Round Drum
• Rear Grip: EXP Shear
  • Aim Down Sight Speed: -1.00 oz
  • Sprint to Fire Speed: -0.45 in

To be completely honest, the ISO 45 is not my favorite SMG in Warzone—not even close, but it became the meta in Season Five. I still think it pales in comparison to the Lachmann Sub and Vaznev-9K, especially when it comes to anything outside of close range, but that’s just one writer’s opinion.

If you like the ISO Hemlock’s iron sights, you’re in luck because it’s basically the same thing on the ISO 45. But it needs a lot of help when it comes to areas where it needs to be effective, especially when it comes to mobility and handling.

Since it’s only strong up close, you need to be as quick as possible. These attachments will help out with that, offering buffs to mobility, handling, and accuracy, maximizing your potential to outgun enemies up close.

After some buffs and nerfs in Season Five, the ISO 45 has become the go-to SMG for Warzone players. These attachments are the ones I’ve had the most success with since then.

Best perks for ISO 45 in Warzone

• Perks: Double Time, Battle Hardened, Fast Hands, Ghost or High Alert

I find myself going back to this perk package in Warzone, no matter what weapon I’m using. But it works especially well for SMG playstyles where I’m running and gunning and being aggressive, especially on Vondel or Ashika Island.

Best equipment for ISO 45 in Warzone

• Tactical: Stun, Flash, or Smoke
• Lethal: Semtex or Throwing Knife

Stuns and flash grenades serve the same function: to completely disorient your teammate. I like to use these when the enemy is on the run to try and stop them in their tracks. Make the choice between them or a smoke grenade, which is helpful for pushing through open areas in endgame circles.