The Gunslingers with Weapon Cords was dumber than this. The rules worked like this:
A max level Gunslinger could normally only fire a one-handed gun a maximum of 4 times. But you could dual wield one-handed guns to get four shots with each gun. But wait a minute! You need a hand free to load the gun. Enter the Weapon Cord!
With two guns in your hands, both connected with weapon cords, you drop the gun in your left hand. Then you use your left hand to load the gun in your right hand and make four attacks. Then you drop the gun in your right hand and pull the gun connected to your left hand by a weapon cord back into your left hand. You then use your right hand to load the gun in your left hand to make four more attacks, for a total of eight attacks.
Now, if you can fire four shots with one hand, then four shots with your other hand, why can't you just fire 8 shots with one hand? Because that wouldn't be dual wielding! Now would it!