Using raycast - Why can't I get a variable on the object I hit?

I am trying to make my zombie get physics.AddForce applied, that's not the problem. My problem is, on my Bullet scipt, the one I shoot with, I'm trying to set a public static Vector3 in a script on my zombie to the vector3 of my bullet direction (because I'm trying to add direction to my AddForce with:

dir = target.transform.position - transform.position;

dir = dir.normalized;

rigidbody.AddForce(dir * force);

). So my main problem is, setting that variable. It's static and public (which shouldn't matter). When I create a random script and try to access the variable from there, I use

 KillZombie.raycastDirection

with KillZombie being the script on my zombie which has the AddForce command, and raycastDirection being the variable that I want to set from my bullet script. When I type it out, it "auto completes" as usual, but on my bullet script, it doesn't. I've tried all of these:

 if (hit.transform.GetComponent<KillZombie>().raycastDirection)) {
 //Do Stuff
 }
 
 
 
 if (hit.transform.parent.GetComponent<KillZombie>().raycastDirection)) {
 //Do Stuff
 }
 
 
 if (hit.gameObject.transform.GetComponent<KillZombie>().raycastDirection)) {
 //Do Stuff
 }

And I have to do it like this, not:

 if (KillZombie.raycastDirection)

obviously because I'm using an if statement to see if the instantiated object I'm shooting has the "KillZombie" script. Please help me! I'm pretty sure it's right in front of me, but I don't know why it's not working. Thanks if you read this!