Reference Book: Star Wars Saga Edition Starships of the Galaxy
Starship Systems Type: Weapon Systems
Double and Quad versions of Blaster Cannons, Laser Cannons, Ion Cannons, and Turbolasers are available, creating reciprocating multibarrel weapons. A Double or Quad Cannon has the given availability, or the availability of it's base Weapon System, whichever is more restrictive.
Triple Cannons Edit
Some Starships also carry Triple Cannons. These are functionally identical to Double Cannons, using three cannons (With slightly less power individually) instead of two standard cannons.