Grey Area?

I'm vaguely thinking of writing a short Culture crossover fanfic when I have the Harry Potter / Wonder Woman thing finished. For reasons not entirely unrelated to my wanting to use a bad pun, plus its general attitude, the ship in the story will probably be the GCU Grey Area (notorious for using effector technology to violate mental privacy), which was not in the Culture universe at the end of Excession.

The problem I'm running into is that there doesn't seem to be much information on the Grey Area's weapons and equipment. I'm assuming near-perfect stealth technology, ditto displacer technology (beaming people up and down etc.), effector technology capable of total invasion of privacy when dealing with primitive 21st-century computers and other records (also human minds, which is how it earned the charming nickname Meatfucker), shuttle craft, drones with knife missiles, and all of the other usual Culture tech, but I'm not sure what sort of big guns (if any) a GCU would carry - it isn't actually a military ship, though I'd imagine it could ramp up fairly quickly given an asteroid or two to assimilate for raw materials, but the Culture Wiki says that 'GCUs were considered able to "waste planets."'

Anyone got any thoughts? General size etc. would be useful too.

Something Questionable

Questionable Content fans who aren't already reading the Something Positive web comic may want to check this out - not really work safe:

https://somethingpositive.net/comic/pintsized-recycling/