The Puma was designed to accommodate additional armor, initially planning to offer three protection classes which are wholly or partly interchangeable. Protection class A is the basic vehicle, at 31.5 metric tons combat-ready weight air transportable in the A400M. Protection class C consists of two large side panels that cover almost the whole flanks of the vehicle and act as skirts to the tracks, a near-complete turret cover and armor plates for most of the vehicle's roof. The side panels are a mix of composite and spaced armor. It adds about 9 metric tons to the gross weight. Originally, there was also a protection class B designed for transport by rail. However, it became obvious that class C lies within the weight and dimension limits for train/ship transportation, thus class B was scrapped.