I disagree, even carrying them both at one time does not mean fired at the same time. I am not world class but I can still hit target with my weak hand. As far as easier to repair with dual caryy you have all the spare parts you could want. In a true Zombie Appoc I would rather have 2 guns anyday. If this was one M4 vs 2 Mac 10's I still would rather have 2.