Panzerschrek

The Panzerschrek is a canon weapon that appears in all Call of Duty: World at War zombie maps.

Overview
The Panzerschrek is very good for taking out large groups of zombies but splash damage is a major issue, and as there isn't PhD Flopper on the World at War maps, it is ineffective. Also, the mobility is very low, and it only hold one rocket at a time. Oddly, on Nacht der Untoten it has 4 reserve rockets, on Verrückt it has 16 reserve rockets and on Shi No Numa and Der Riese it comes with 20 reserve rockets.

Longingus
If you Pack-a-Punch the Python you will get the Longingus. It improves most of it's problems, as it hold 3 rockets and mobility is increased. Also, it has greater damage and greater splash damage. However, the splash damage increase means you can be harmed more by it.