Gun Script glich?

I tried to put a reload animation but that failed so I removed it and I ended up with something weird where the gun would fire once every frame and would not respond to any input and also would not stop when it ran out of ammo. help? #pragma strict

 var Effect : Transform;
 var TheDammage = 100;
 var forward;
 var MAmmo = 30;
 static var ToatalAmmo = 90;
 var offsetY : float = 40;
 var sizeX : float = 100;
 var sizeY : float = 40;
 var MagSize = 0;
 var ReloadSound : AudioClip;
 var ShootingSound : AudioClip;
 var IsSniper = false;
 var IsG36 = false;
 // Checking what weapon is what.
 function Start (){
     if (IsG36 == true){
     MAmmo = 30;
     ToatalAmmo = 90;
     MagSize = 30;
     }
 
     if (IsSniper == true){
         MAmmo = 7;
         ToatalAmmo = 28;
         MagSize = 7;    
     }
 }
 //Adding Ammo GUI
 function OnGUI () {
     GUI.Box (new Rect (Screen.width/2-sizeX/2, offsetY, sizeX, sizeY), "Ammo " + MAmmo + "/" + ToatalAmmo);
 }
 function Update () {
     
     var hit : RaycastHit;
     var ray : Ray = Camera.main.ScreenPointToRay(Vector3(Screen.width*0.5, Screen.height*0.5, 0));
     
     //Control
     if (Input.GetMouseButtonDown(0))
     {
             }
         if (Physics.Raycast (ray, hit, 100))
         {   
             //Reloading (WIP)
                 if(MAmmo < 1){
                     ToatalAmmo -= MagSize;
                     MAmmo += MagSize;
                     }
         //Subtrating From Ammo            
             MAmmo --;
         //Firing gun    
             var particleClone = Instantiate(Effect, hit.point, Quaternion.LookRotation(hit.normal));
             Destroy(particleClone.gameObject, 2);
             hit.transform.SendMessage("ApplyDammage", TheDammage, SendMessageOptions.DontRequireReceiver);
             audio.Play();
             particleSystem.Play();                
             
         }
     }