All of the Runners have a specific weight limitation, and can have their weapons, shield generator and engines interchanged and removed based around this limit. Each of the runners has a primary weapon mount, and one or more secondary weapon mounts, along with a shield and generator bay. Primary weapons are mounted on the head of the Runner and most feature twin primary mounts for a pair of guns. Secondary mounts are singular and weapons can be grouped, single, or alternately fired independent of the primary guns.