Alright, refresh in 15 or less.
The ship is so small because the warp generator only has to make a small bubble of isolated spacetime in order to travel at warp warp, so the warp generator must only be about ye big *gestures expansively*. Besides, this is the both the future, and fiction.

Ok, done. I hope that is more reasonable. I made the armor less protective and the magnetic field less powerful.
I just want it to be known that we have magnets almost as powerful today too, and I think that magnetic field based weapons are a legitimate possibility. Maybe just as a universe update here, Magnets might just be the most effective weapon for taking down battleships, large and small.

I doubt my ship will be in a battle for too long anyways, spies don't have time for battles.

Added my main character projectile weapon, added detail.