QUOTE (Marcus Gideon on another thread)
Heck, the rules say that you can dual wield against 2 targets with ease even if they're on opposite sides of the room, but absolutely forbids shooting at the same guy twice. Even though all you do is point both guns in the same direction and shoot...
Actually they got a mod for that now...
Just Download the 'Breaking Thoth-Amon's Mirror'(BTAM)™ App for your Smartlink System.
Normally when you are designating targets for your shooting solution the system utilizes the One Target, One Lock feature which is designed to prevent you from assigning two different target designations on the same individual while dual wielding.
This is of course to avoid doubling up while shooting in a target rich environment, so if you are facing mooks A,B,C, and D and you set the firing system to calculate for four targets you don't end up with a spread pattern of A, B,C, and B again because you accidentally assigned B as both B AND D, which in turn left the real Mook D out of the killing loop because you only called up for a shooting solution involving 4 highlighted targets, leaving this last mook standing and able to get a shot in on you before your next pass.
Breaking Thoth-Amon's Mirror™ allows you to override this One Target, One Lock feature to 'mirror' the same target on the shooting solution list of valid targets.
This has the effect that now you can designate Mook A as Target A AND Target B for any shooting solutions, thus freeing you up to blaze away merrily
at just Mook A alone exactly as if you were shooting actual seperate parties while dual wielding without running into targeting conflicts and other cosmic restrictions particular to the SR universe.
It can be easily toggled on and off with a Simple Action (Free Action if using Wireless ON) for when you are shooting at groups and do not want to accidentally focus fire on just one target.
Consult your local Gunsmith or Fixer today about whether BTAM™ may be right for you.
Side Effects of BTAM™ may include Faux Slow Motion Shooting, obscure Gun Fu references, white doves flying away just before the shooting starts, and increased ammo consumption.
Don't install BTAM™ if you are prone to Spray&Pray, only target large crowds or suffer from moral qualms about blowing the absolute hell out of a single target.
Please use Responsibly.

F.A.Q.
QUOTE (psycho835)
What if I'm using iron/laser/holographic sights?
Well it's the darndest thing.
Research to date show that if you are dual wielding and try aiming both firearms at the same guy using just the iron sights when you pull both triggers at the same time it's nearly a 99.999999999% certainty one of the guns will jam, suffer hangfire or otherwise fail to discharge, though this problem strangely resolves itself once alternate targets are acquired.
The same happens when using laser/holographic sights, but it gets even weirder.
Several shootists surveyed during this study on this have claimed one of the two light beams actually bent away from the targeted individual, though this effect has not been reproduced in the lab at present.
In the case of the holographic sight, there were reports ranging from one holo sight failing entirely all the way to overlaying a totally separate target with the AR image with the round from that weapon following suit or simply failing to discharge as above.
So don't let Mother Nature tell you who or how often you can or can not shoot someone, get BTAM™ today and take back your gunbunny's life.