How To Unlock the ISO 45 SMG in Warzone 2 & MW2
Warzone 2 Season 4 is released on August 07, 2025. It brought huge amounts of content to Warzone, DMZ and Modern Warfare 2. Among the additions is thebrand new ISO 45 submachine gun, but how do you unlock it in MW2 and Warzone?
How To Unlock the ISO 45 SMG in Warzone & MW2
Like theTempus Razorback,the ISO 45 is unlockable for free so long as players have theSeason 4Battle Pass.Specifically, it’s unlocked by ranking up the Battle Pass and claiming Battle Pass Sector D19.
S4’s Battle Pass works the same way it did in previous seasons, with players using their earned Battle Pass Tokens to claim new sectors and unlock content as they go. D19 is not all that close to the starting sector, so it might take some time before you’re able to claim it and get hands-on with the ISO 45.
Modern Warfare 2and Warzone share a Battle Pass again, so you can unlock it whichever title you spend your time with. Once it’s unlocked, it’ll be available in WarzoneandModern Warfare 2.
What is the ISO 45 SMG?
The ISO 45 SMG is one of three new weapons that entered the fray with Call of Duty Warzone and Modern Warfare 2 Season 04.It first appeared in Modern Warfare 2019 and returns in the sequel four years later. The other new weapons are the Tempus Razorback AR, the Tonfa melee weapon and a REDACTED shotgun that will drop with Season 4’s mid-season update.
It’s described in-game as:The ISO Platform’s answer to room clearing. This SMG dominates with a high fire rate and the stopping power of .45 Auto rounds.
We don’t quite know how it’ll perform in game, but we’re leaning towards it being a replacement for the Fennec .45 which, since dominating early seasons of the BR sequel, has been nerfed heavily (andwas again with Season 4). The emphasis on room-clearing certainly makes us think that it’ll be a fast-firing pocket-rocket that performs best at those ultra-close ranges. Presumably, it’ll be harder to control because of these strengths.
We do already have a recommended ISO 45 loadout, so be sure to check that out so you know how best to run the new SMG.
That’s all there is to know abouthow to unlock the ISO 45 SMG in Warzone and Modern Warfare 2. Be sure to peruse theSeason 4 Patch Notesto read up on everything elseActivisionare set to release, or look at the related content below.
