On a Matilda Suspension, yes. Most of the vehicles and weapons in the game are like that, kit-bashed variations of real-world weapons. The Fed's Grumble for example draws a lot of inspiration from the BTR-80, and most of their armored vehicles are also based off of Soviet equivalents. The Lupes on the other hand are more influenced by French and British vehicles when it comes to their own, such as with the Denmother, which is, iirc, based off of the British light tank series.
Swedish S tank?
On a Matilda Suspension, yes. Most of the vehicles and weapons in the game are like that, kit-bashed variations of real-world weapons. The Fed's Grumble for example draws a lot of inspiration from the BTR-80, and most of their armored vehicles are also based off of Soviet equivalents. The Lupes on the other hand are more influenced by French and British vehicles when it comes to their own, such as with the Denmother, which is, iirc, based off of the British light tank series.