Here are all my bindings for fortnite, I really recommend using your mouse for switching between building as it gives you a huge advantage over others who are using scroll wheel. And it's way faster. Never use scroll wheel for changing weapons or building if you wanna get better. I included my weapon bindings for no reason really, I just find it interesting that lots of people use a variety of bindings for their weapon slots. Lots of people don't like using the normal 1-5 numbers because they cannot reach them. I played csgo for years and I'm used to hitting number 1-6 so idk. Weapon slots really don't matter as long as they are convenient to you.
Weapon Slots: 1- AR 2 - Shotgun 3 - Shotgun / Sniper 4 - Sniper / Med / TAC Sub / Gernade Z - Med