The SD-4 was the fourth model of the Balmorran Arms SD-series battle droids.
Characteristics
The SD-4 model was an improvement over the first three versions in the SD-series, incorporating secret programming data that was stolen from the files of General Rom Mohc's Dark Trooper Project.[1]
Sources
- The Essential Guide to Droids
- The Official Star Wars Fact File 43 MIL 7-8: Military Droids