How do I get variables from my characters animation blueprint in my character blueprint?

I am wanting to give my character two modes- Armed and unarmed and I have created the animation blueprint but I am struggling on how I can communicate to the Anim BP that I have pressed a certain button to pull out his gun. I have created an event in my character BP that changes a boolean value when the button is pressed, but I am stuck from there.

If I am just going about this the completely wrong way, any guidance would be greatly appreciated.

Take a look at this walkthrough as it goes through binding input events and having the animation BP read them: