The X11 is a spaceship design to carry one passenger and one pilot, it is an extremely defensible spaceship, thus it is normally used to transport important people through dangerous areas.
It can function as a fighter at need, because it has guns, however, it is not very agile, and cannot keep up a dogfight for more than a few minutes. It can also function a body guard for larger spaceships.
very nice ship. I love how simple this is, people tend to overdo it sometimes but this is great. And in regards to cody's comment, snot can really make your MOC spectacular, but only use it where it looks best, sometimes have the studs pointing up is the best thing (like in this case). anyways.... great job!!