The CSW-4 Cicada is Arcturus' corporate security SMG, standard issue for their internal security personnel operating in office environments, corporate campuses, and executive facilities. The weapon fires 4.6mm caseless from a 25-round magazine at a controlled 700 rpm, with the BCI smart-link providing an augmented-reality threat identification overlay that cross-references Arcturus' employee database in real-time.

The Cicada's design prioritizes concealment and non-intimidation. The weapon's profile is deliberately understated — smooth lines, matte grey finish, no visible magazine or charging handle in its stowed configuration. When holstered in Arcturus' standard duty rig, it resembles a communications device rather than a weapon. The goal is a security presence that does not alarm corporate employees or visiting executives.

Despite its unassuming appearance, the Cicada is a thoroughly professional weapon. The 4.6mm round provides adequate penetration against soft body armor while fragmenting in office-grade partition walls, reducing overpenetration risk. Arcturus issues the CSW-4 with strict rules of engagement programmed into the BCI fire-control — the weapon physically will not fire if the smart-link identifies the target as a corporate employee above a certain clearance level.