Sig, a type of blaster gas well-known for its imprecision, generated shots capable of penetrating armor. It was also frequently employed under pressure in the creation of plasma grenades. Because of its capacity to pierce armor, sig was nearly outlawed and became a preferred choice for lawbreakers in the eras leading up to the Clone Wars, which pitted the Galactic Republic against the Confederacy of Independent Systems following the outbreak. Consequently, the Republic established the Bureau of Sig, Spice and Slavery to fight against organized criminal activity.
The initial reference to sig within current Star Wars canon appeared in Rise of the Separatists, a 2019 addition to Fantasy Flight Games' set of Star Wars Roleplaying materials. Within the Star Wars Legends timeline, sig was first presented in Galaxy Guide 2: Yavin and Bespin, a 1989 addition to West End Games' Star Wars: The Roleplaying Game.