Take a Nartaki
make him a Changeling III
-Give him an extra set of Kali Arms
-Give him Biocompability (Cyberware)
Now install the following (all Alpha)
Obvious Cybertorso
Obvious Cyberlimbs X6
External Weapon Mount (Shoulders) X2
External Weapon Mount (Lower Arm) X6
Articulated Weapon Arm (Back) X1
Weapon of Choice: The one that slings the most lead...
I choose the Ingram Supermach 100. Now, it cannot accept barrel or underbarrel mount accessories but it can be modified.
So, Ingram Supermach 100 with underbarrel Ingram Supermach 100. Gas Vent 3 (x2), Top Smartlink and the larger Clips (60 shots).
We have 9 weapon mounts and 6 arms giving us 15 Ingram Supermach 100 which is essentially 30 ingram Supermach 100.
Each weapon has 6 points of recoil compensation.
It is of course debatable in how useful this would be but who cares.

We could also add X amount of drones that tracks the rangefinder of the smartlink of the character and add an additional X guns from X drones...