How to define a collision between a bullet and a drawn sphere object.

I created a new project of type FPS, then I drew 10 spheres.
I am asking you about creation of such a custom event in my actor where I drew those spheres, so that I could call that custom event out of a blueprint with the bullet,
where I actually implement hit detection of the bullet with one of those spheres. Can I detect the hit with a sphere which is not an actor, and is just a drawn object?