DamageFor every 3 points by which the attack roll beats the difficulty, an additional buzz droid lands on the target, to a maximum of five buzz droids. See buzz droid stats in the Droids Stats book, pages 26-27.
Background
The droid tri-fighter was a model of droid starfighter utilized by the Confederacy of Independent Systems during the Clone Wars. It was specifically designed to engage and excel in heavy dogfighting. Despite being the smallest starship in both the Republic Navy and Confederacy navy, the tri-fighter was heavily armed, and possessed an advanced droid brain, which gave it an advantage when dealing with organic pilots. These droid brains were more advanced than those integrated in various other droid starfighters manufactured for the Confederacy. Conceived for the total destruction of an enemy, it possessed an array of missiles and other armaments.