Add force to a rigid body with raycast

I made a gun script and it works good and stuff but I can't get it to add force to a rigid body with out getting a error.

heres the main part of the script

 var TheDammage = 100;
 
 function Update () {
     
     var hit : RaycastHit;
     var ray : Ray = Camera.main.ScreenPointToRay(Vector3(Screen.width*0.5, Screen.height*0.5, 0));
     
     if (Input.GetMouseButtonDown(0))
     {
         if (Physics.Raycast (ray, hit, 100))
         {
             hit.transform.SendMessage("ApplyDammage", TheDammage, SendMessageOptions.DontRequireReceiver);
         }
     }
     
 }

whole script

 var clipsLeft = 3;
 var AmoLeftInClip = AmoInClips;
 var TheDammage = 100;
 var AmoInClips = 30;
 var shoot : boolean = true;
 var Reload : AudioClip;
 var Fire : AudioClip;
 var Force = 10;
 var Range = 900;
 
 function Update () {
     var Hit : RaycastHit;
     var DirectionRay = transform.TransformDirection(Vector3.forward);
     Debug.DrawRay(transform.position , DirectionRay * Range , Color.red);
     var hit : RaycastHit;
     var ray : Ray = Camera.main.ScreenPointToRay(Vector3(Screen.width*0.5, Screen.height*0.5, 0));
     
     if(Input.GetKey(KeyCode.R) && shoot == true)
     {
         AReload();
     }
     
     if (Input.GetMouseButtonDown(0) && shoot == true && AmoLeftInClip > 0)
     {
         AmoLeftInClip -= 1;
                  audio.PlayOneShot(Fire);
         
         if (Physics.Raycast (ray, hit, 100))
         {
             Hit.rigidbody.AddForceAtPosition ( DirectionRay * Force , Hit.point);
         //    hit.rigidbody.AddForceAtPosition(10 * forward, hit.point);
             hit.transform.SendMessage("Hurt", SendMessageOptions.DontRequireReceiver);
             
         }
     }
     
 }
 
 function OnGUI()
 {
     GUI.Label (Rect (0,800,80,20), AmoLeftInClip.ToString(), "box");
     GUI.Label (Rect (0,840,80,20), clipsLeft.ToString(), "box");
 }
 
 function AReload()
 {
     if(AmoLeftInClip < AmoInClips && clipsLeft > 0)
     {
         shoot = false;
          audio.PlayOneShot(Reload);
         yield WaitForSeconds(1);
         clipsLeft -= 1;
         AmoLeftInClip = AmoInClips;
         shoot = true;
     }
 }
 
 function OnTriggerEnter(other : Collider)
 {
     if(other.gameObject.tag == "Amo")
     {
         clipsLeft += 1;
         Destroy(other.gameObject);
     }
     
 }