Si - it's two kits - the pickup is from the two-vehicle Meng kit which also comes with a 4-door pickup and the gun is from the Meng set of 4 different Russian AA guns ( ZPU-1, ZPU-2, ZPU-4 and the ZU-23-2 used here)
The other pickup is a bit more tongue-in-cheek....
I think Meng do a kit with pickup & AA gun but I couldn't find it - The zombies are MasterBox "zombieland" series - the driver is the motorcycle rider in the set converted