The Arbiter

Certain situations can only be resolved through the gratuitous use of a rocket launcher. The Arbiter should be your first choice against virtually any enemy in the game, but especially Executioners, Laser Backs, Dropships, and other high-priority targets. It's a rare enemy that can take more that one shot from a mid-to high-level Arbiter. At level 10, the Arbiter transforms into the Silencer with the added functionality to fire of a round of three rockets simultaneosly, using only one shot of ammo.