And by "Weapons" I mean ranged weapons specifically. Melee weapons would certainly be useful for close-quarters, but due to the range at which combat occurs in this question, I'm looking for ranged weapons like firearms.

They must function in zero-G, but functioning in a vacuum isn't a necessity due to the fact that most of these fights are going to be taking place inside the space station.

Combat will be taking place in all kinds of distances, from long hallways to open hangars to enclosed residential areas, so any kind of range on the weapons suggested is fine.