The hidden launcher can be loaded with either grenades or smoke rounds. The mega launcher is used as a beam rifle when it is not attached to the chest mega particle cannon port. I am not sure whether that port can fire independently.
Rakan's unit's hidden arms (remote arms) are laser guided as opposed to the wired ones of the standard machines. The heat rod is a close combat weapon equipped before they had implemented psycommu. (I am not sure whether quasi psycommu is counted. If so, the heat rod is no longer equipped)
Can someone confirm whether only ZZ, CCA and 0080 old kits have super detailed technical manuals as exemplified by these scans? I would like to see more of these, saw some random ones on 2chan before.