The Zap Gun/Wave gun Dual Wield is a electronic wonder device similar to the Wunderwaffe DG-2 in both Call of Duty: WaW, and Black Ops. The Zap Gun/Wave gun Dual Wield can be put together to create the Wave Gun, which can be seen here. The Zap Gun can hold up to 8|8 ammo, when pack-a-punched, the zap gun turns into Porter's X2 Zap Gun, which can hold up to 12|12 ammo. When the wave gun is combined from the 2 zap guns, pack-a-punched would be called the Max Wave Gun, which will be added to Wave Gun's wikia information soon.
These guns when will shoot exactly like the DG-2, except it does not chain onto other zombies. The Zap Gun/Wave gun Dual Wield can be found in the Mystery box in the zombie level Moon for 950 Points each. It was known to shoot like a ray gun on one side and the Wunderwaffe DG-2 on the other.
The zap gun is the first dual wieldable and interchangeable wonder weapon in zombies.
The Porter's X2 Ray Gun is similar to the zap gun when pack-a-punched because H. Porter also created this gun.
Treyarch Designer Max Porter, the creator of the ray gun design, made this design also, so as the wave gun.