its a fair question because going back to look at it, by my calculation the stuff that came standard with it exceeds the mod weapon slots to even start with.
Hound has 2 Weapon Mount (Internal, Flexible, Manual) and another 2 Weapon Mounts (Internal, Fixed, Remote)
Assuming Medium weapons across the board the first set has a cost of 6 slots each ( 2 for medium mount, +2 for Internal, +1 for flexible and +1 for Manual) so that's 12 slots for that pair.
The next pair comes in a bit cheaper at 4 slots each (2 again for medium mount, +2 for internal and the Fixed and remote options are freebies.) for a total of 8 slots just for that pair.
So that is the equivalent of 20 weapon slots right off the bat, well in excess of what the body would provide by itself. So preset from factory probably does come in before modding.
However it then muddies the water because if the rigger gets these to start, does he really get another 15 slots for further weapon add ons?
Or is it like drones where it should say Body 15 [5-weapon (this is just a number drawn out of a hat for an example)] to reflect that they have 5 more slots available for modding weapon because it already has a sweet package pre-installed?