An alternative (PS, I hate the legality rules too) is to remove the Ingram White Knight for now and instead put on an AK-97 with an external smartgun. The White Knight's big selling point is the magical gas-vent 5 system, which you don't need on a drone, and the AK-97 is Restricted rather than Forbidden. That means you can now license it. Mounted weapons can be swapped out easily so you can replace it with something else later if you want.
Comedy option: put an Lone Star FlashFlood Water Cannon on instead. More expensive, but ammo is free, it's actually remarkably effective, and it's hilarious.