A thread earlier about Darth Maul's Sith Infiltrator had me looking at it's Wookiepedia page, which says it was equipped with special cannons capable of ignoring shields. Even before you consider the Star Courier's dead cool appearance, a shield ignoring gun is an interesting idea.
What do you think it should be statted and costed at? I'm thinking Firepower 3, "Attack: any BAM or KAPOW! hits inflicted by this weapon are applied directly to the target's hull, ignoring shields." Cost should be in the area of the HLC, maybe even more.
There should be at least one drawback, possibly two. Limited to Range 2, generates a stress when fired, cannot be fired when stressed, attack dice may not be affected by tokens or abilities, something like that.