|The following is based on the spin off novel by Keith R. A. DeCandido and some details might contradict canon.|
The EW1 is GDI's first attempt to create a directed energy weapon, commonly referred to among soldiers as a "raygun".
The design is based on Nod T7 weapons procured by GDI during an operation in San Diego in the early stages of the Third Tiberium War. The weapon itself is powered by Tiberium and is not commonly used due to its prototype status. The gun was more effective than most man-portable weapon against the Scrin. However, the EW1 prototypes were prone to mechanical breakdowns. Furthermore, the containment for the Tiberium was imperfect, causing the guns to leak Tiberium after some use. Most of the work developing the EW1 was done by Dr. Takeda.