How to unlock the ISO 9mm in MW2 and Warzone

It's the third ISO in MW2.

What's the point of the ISO Hemlock, ISO 45 and ISO 9mm being in the same Platform if the former doesn't share any Attachments with the latter 2? No Stocks, Grips, anything.

How to Unlock the ISO 45 SMG in Warzone 2! FASTEST Way to Unlock ISO 45 SMG in Warzone 2 and MW2

Modern Warfare 2 & Warzone 2 ISO 9mm: How To Unlock & Best Attachments

NEW NO RECOIL ISO 9MM CLASS is BROKEN in MW2 SEASON 6! (Best ISO 9MM Class Setup) - Modern Warfare 2

NEW ISO 9MM is OVERPOWERED in MW2! (Best ISO 9mm Class Setup)

Introducing BlackCell, the Battle Pass, and Bundles for Call of Duty: Modern Warfare II and Call of Duty: Warzone Season 06

Introducing BlackCell, the Battle Pass, and Bundles for Call of Duty: Modern Warfare II and Call of Duty: Warzone Season 06

How to unlock the ISO 9mm in MW2 and Warzone

ISO 45, Call of Duty Wiki

Warzone Season 6 Weapons: Everything You Need to Know About TR-76 Geist, ISO 9mm, and Dual Kamas