GetComponent Picking up multiple scripts from differrent objects?

I have a player who shoots a raycast at a target, the raycast hits this target and returns its tag. The object hit has multiple copies of itself from the same prefab (its a target board to shoot at) and each copy has it's own script which has a function which deducts health when it is shot.

The gun's code:

 if (Physics.Raycast(Spawn.position, direction, hit, range)) {
             if (hit.collider.tag == "target") { 
                 var targ : GameObject = hit.transform.gameObject;
                 targ.GetComponent(target).takeHealth(5);

The target's code:

 static var health = 50;
 
 function takeHealth(mod) {
     health = health - mod;
     isDead();
 }
 
 function isDead() {
     if (health <=0) {
         Destroy(gameObject);
     }
 }

My problem is, if I destroy one of these targets, all of the target's healths will be deducted. How do I stop my game from deducting the health from all of them and only the one i am shooting at?