It is not known what purposes the two weaponry stations serve alongside the Tantalus Rays, although it is likely that they are secondary weapons of some sort, used to protect the Mothership itself from attack. Seeing as the level contains 8 hyperpistols, it is very likely that this facility is used to create or store arms to be used in small scale defense or invasion.
Weaponry A is relatively easy to pass, since most of the Vorticons there are children. It is sparsely populated, though there is one Vorticon Elite who is guarding two guns at the bottom of the level. Keen has to collect the four keycards in order to reach the exit. As Weaponry A, it features a huge plasma pool convering all the bottom of the level; however, it is not easy to fall into the pool, as most of it is covered.
This is also one of the few levels (the other being the Reactor Core) to be partially in perpetual darkness (different from the darkness obtained by turning off the lights in some levels).
See also the list of Keen 2 levels.