I am toying with the idea of a very large missile that is designed to be a Star Destroyer destroyer (or Capital ship destroyer)
It would basically be a remote guided missile, possibly the size of a Sil 1 starship, launched from another ship. The idea is that it would be controlled remotely to fly very fast towards a capital ship, perhaps even has shields, and be packed with enough boom to disable the ship. Think of kinda like the A-Wing did to the Super Star Destoyer in RotJ, only with no crew, and with more boom on board.
Before I invest too much brain power to it, I wondered if there was already something similar? What is the largest missile in the rules? Are there big missiles mentioned in EU?