Gun Script Js

You could wait for the reload time, then reload bulletcount and decrease magcount. This can be done in Update like this:

 var bullet : Rigidbody;
 var power : float = 1500;
 var damage : float = 100;
 var reloadtime : float = 4; // this reload time is too long!
 var magcount : int = 10;
 var magbulletcount : int = 21;
 var bulletcount : int = 0;
 
 private var reloadTimer: float = 0.0; // internal reload timer
 
 function Start () {
   bulletcount = magbulletcount;  
 }
 
 function Update(){
   if (reloadTimer > 0){ // if reloadTimer active...
     reloadTimer -= Time.deltaTime; // decrement it
     if (reloadTimer <= 0){ // if reloadTime ended...
       bulletcount = magbulletcount; // load a full clip...
       magcount--; // and decrement clip count
     }
   } 
   else // only shoot when reloadTimer not active
   if (Input.GetButtonDown("Fire1")&& bulletcount > 0){
     var instance: Rigidbody = Instantiate(bullet, transform.position, transform.rotation) as Rigidbody;
     var fwd: Vector3 = transform.TransformDirection(Vector3.forward);
     instance.AddForce(fwd * power);
     bulletcount --;
     if (bulletcount <= 0 && magcount > 0){
       // if run out of ammo but still have clips...
       reloadTimer = reloadtime; // activate reloadTimer
       // you can play reload sound or animation here
     }
   }
 }

Not tested ..

 #pragma strict
 
 var bullet : Rigidbody;
 var power : float = 1500;
 var damage : float = 100;
 var reloadtime : float = 4;
 var magcount : int = 10;
 var magbulletcount : int = 21;
 var bulletcount : int = 0;
 
 private var reloading : boolean = false;
 
 function Start () {
 
   bulletcount = magbulletcount;  
 
 }
 
 function Update () {
 
 if(!reload && magcount > 0){
     fireWeapon();
 if(magcount == 0){
     print("Out of magazines .. go find some more");
         }
     }
 }
 
 function fireWeapon(){
 
 if (Input.GetButtonDown("Fire1") && bulletcount > 0){
     var instance: Rigidbody = Instantiate(bullet, transform.position, transform.rotation) as Rigidbody;
     var fwd: Vector3 = transform.TransformDirection(Vector3.forward);
     instance.AddForce(fwd * power);
     bulletcount --;
 if (bulletcount == 0){
     reload();
         }
     }
 }
 
 function reload(){
 
     reloading = true;
     magcount --;
     print("reloading weapon " + magcount + " Magazines left");
     yield WaitForSeconds(4.0); // wait for 4 seconds while the gun reloads
     reloading = false;
     bulletcount = magbulletcount;
 }

i have a question im using aldo's method so how would i display the # of clips left on screen