‣ Double Pump - [Keybind To Toggle Between Keyboard Keys] ???

• Okay so I'm playing Fortnite and my usual load out in the inventory for slots 2/3 is my double pump. So what I'm wondering is if it's possible to set a key bind on the side button of my Razer Basilisk (mouse) to toggle between keys 2/3 which is the primary and secondary pump. This would allow me to free up the second side button for some other action.

• Basically what I'm picturing is I would click that side button it would toggle slot 2/key 2 (primary pump) I would pull of a shot with the pump. Then quickly hit that same side button but it would toggle to slot 3/key 3 this time (secondary pump) and pull of my second shot; then repeat. Ideally it would just toggle back and fourth between keys 2/3 making the double pump strategy much more effective.