If the batteries are in the configuration of 1 to both drive motors and 1 to the weapon, I can't see why this wouldn't work. I do something similar with The Honey Badger 2.2.

Motor certainly reads as if it is beefy enough (though note it says it wants a 6S battery and the one you've linked to a is a 5S) but I don't know enough about brushless tech to be sure at the moment :S