I suppose real plan because i have seen it on Maru Mechanics ( i attach cover)I will search the picture. I'm not sure a version with 4 machine gun 13 mm on wings is a fake or a real plan.
Could be it !It doesn't exist as far as I know. Could it be that the first image in the first post are not wing guns but a radar antenna?
That actually makes sense. I can definitely see the similarities between the gun barrels and the radar antennae. Also, in the original B6N picture, you can actually see the radar antennae on the sides too.This is not the B6N but the earlier B5N Kate, fitted with the H-6 radar. Notice how the wing antenna when viewed from the side look like gun barrels: