[whswhs]

Originally Posted by Kelly Pedersen

Cannons 1-3, each Huge Piercing Attack 15d (Inaccurate (-3), -15%; Increased Range (x10), +30%; Increased Range (1/2D Range only) (x5), +10%; Limited Use, 1 shot/day, slow reload (requires 30 seconds per shot), -35%; Rapid Fire (+2), +40%) [156]

The Cannons there represent the cannons the Moving Castle has on its roof. I don't recall if they were ever fired in the movie - what I've got there represents what I think is a reasonable thing for medieval-looking cannons to be doing. Probably a little low, damage-wise, actually, but they're already tying up a lot of points.

Another option would be to buy a bunch of Extra Arms with the Weapon Mount limitation, and treat the cannons as "possession" of the castle (along with its furniture and such) rather than as parts.