Ahem.... Unless the general design calls for it a melee weapon on a typical space fighter is kinda

I had been toying with the idea of a "Beam Saber" for quite some time (especially for the Gundams).
I know people would be amused by a Gundam slicing through the bridge if an ISD or something similar.

Unfortunately the ability to animate the ARM to swing a sword (be it a weapon point or other physical object) eludes me and probably would need to impliment convergent fire. Whch I need to sit sown and understand one day). For now I've paused such experiments for other projects waiting to see what Gai's Seed team comes up with to deal with the issue.