Namely the Cyber-arm-Gyro-Mounts, the Cyberarm Fore-arm mounts, the Tracking shoulder mounts, and the Articulate Gyro mount.
now. Count with me here...
That's once gun in one hand, A 2nd gun on the Fore-arm mount, a third and fourth on the other arm, a Fifth and sixth on the shoulders, and number seven on the articulate arm.
now, to the best of my knowledge the only ruling anywhere in the rules about using two firearms at once goes something like "Bonuses from Smartlinks are negated, and there's a flat +2 penalty for each gun".
now, my questions....
Is that +2 penalty added to the (again, from what i can remember of the rules) "appropriate firearms skill, plus half of the "off hand Firearms skill" number of dice, with the target number worked out normally,
OR
"appropriate firearms skill" w/ +2 TN and weapon doing +50% higher damage due to the second weapon....
OR
Does some one have a better suggestion?
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Part 2. Target numbers..
If i'm doing my sums right here, Firing one gun at someone is worked out normally, Firing one gun, and the Gun attached to the forearm mount should also be worked out normally, and the bonus from the cyber gun should still count (as you're only actually aiming one gun, and the other gets a smartlink signal to fire)
[edit] Also, any uncompensated recoil from one gun gets applied the overall TN.. but in this case you've effectivly got one gun, with twice the rate of fire)
Similarly firing Two guns, and one, or in fact both of the shoulder mounts is also trivial to work out, as the character is still only firing one gun.... the other one on the arm is going off because it's smart gun circuitry is telling it to.. and the two shoulder mounts are using tracking info from one of the characters cyber eyes (from what i can tell, the rules state that you've got to have a cybereye laser system to use these... which is kind of strange, as there's no way they can track the laser dot.... just imagine the fun you can have with someone with one of these... and the laser pointer on your key-ring....

so so far we've got one character taking very careful aim with one gun, a second firing in the same place, by virtue of being strapped to his fore-arm with some limited tracking capability, and two more going off, as they've got tracking info from where he's looking, and are getting a smart link signal to go off...
Now comes the hard part. The other arm, and the Articulate arm (which for the love of cheese, i cant remember what controls it, or makes it go off...)
Obviously the base TN is going to go up by +2 for the second weapon.
And there's going to be a LOT of uncompensated recoil arround (as we're taking 7 guns here... and IGV 4's ain't cheap)
IS there an additional +2 for using an off-handed weapon, or is that where the +2 came from in the first place?
[edit] Two things occurred to me at this point . well, three actually.
1) obvioulsy all of these guns would be loaded with tracer ammo... cos you cant use smart guns for aiming... But that raised another question.. I'd rule that you only get the aiming bonus (ie, -1tn per tracer round loaded 1 in 3 in the clip) for one gun... 'cos loading up 1 in 3 in all 7 guns gets you a target number which is normally negative

2) This character is the Uber munchkin Lord of broken rules...
3) i've had FAR too much caffeine today....
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So. is this even possible, Are there any cannon rules that cover it, or failing that any good house rules.... and assuming that this character is either big enough to avoid falling flat on his back when he pulls the trigger, or is basically up to his waste in plasticrete when he hits the "vaporise this target" button.. what happens ?
(also, what happens to damage? does someone get hit by 7 separate attacks, or one mutha-lovin' Burst of ammo? )