Weapon-O-Matic machines are back in Fortnite Chapter 4 Season 2, and here's where to find all of them.

One of the many pieces of content that Epic Games brought back in Fortnite Chapter 4 Season 2 is the Weapon-O-Matic Machines. These vending machines can give you guns and ammo, as the name suggests, in exchange for your hard-earned gold bars. These are different from the Mending Machines, which only offer healing items.
Luckily for damage-minded players, Weapon-O-Matic Machines are generally easier to find since they're found in more supply around the map. Mending Machines are much more sparsely spread out across the map while Weapon-O-Matic Machines are usually found at most major points of interest. However, if you need to know exactly where each Weapon-O-Matic Machine is in Fortnite Chapter 4 Season 2, then check out the guide below.
Fortnite Chapter 4, Season 2: All Super Level styles & How To Get
All Fortnite Chapter 4 Season 2 Weapon-O-Matic Machine Locations
In total, there appear to be 25 Weapon-O-Matic Machines in Fortnite Chapter 4 Season 2, at least at the start of it. Epic Games could add more to this total or subtract from it in a future update, but, for now, this is what players have access to. You can see where each and every Weapon-O-Matic Machine is found by viewing the screenshot of the Fortnite island below.

As you can see, there are Weapon-O-Matic Machine locations at just about every major POI in Chapter 4 Season 2. The location that holds the most machines is in and around Mega City, where players can find around five Weapon-O-Matics. Some other POIs only have one or two of the machines, but that should be more than enough for players if they know where to go.
As long as you have enough gold bars and are near a POI on the island, you should be able to visit a Weapon-O-Matic Machine and upgrade your guns in Fortnite Chapter 4 Season 2.