Updated Gun script(js)

 var BulletSpeed = 100; //force of bullets being shot

 var projectile : Rigidbody; //bullet prefab goes here

 var bullets = 30; //amount of bullets per "clip"

 var totalBullets = 60; //total amount of bullets we have available

 var reloadTime = 3; //time to reload

 var reloadAmount = 10;

 var ammo : GUIText; //GUI text for our bullet/ammo count

 var rate : float = 0.5;

 private var rate_time : float;

 var Gun : GameObject;

 var ammoclip : GameObject;

 var flash : GameObject;

 function Update () {

 Fire ();

 Reload ();

 }

 function Fire () {

 if(bullets > 0) { //if we have at least 1 bullet then we can fire

 if (Input.GetButtonDown("Fire1") && Time.time > rate_time) {

  rate_time = Time.time + rate;

 var clone : Rigidbody;// Instantiate the projectile at the position and rotation of this transform

 clone = Instantiate(projectile, transform.position, transform.rotation);

 clone.velocity = transform.TransformDirection (Vector3.forward * BulletSpeed);// Give the cloned object an initial velocity along    the current

 AudioSource.PlayClipAtPoint(sound, transform.position, 1);                     // object's Z axis

 bullets -=1; //subtracts one bullet per fire sequence

 Gun.animation.Play();

 flash.animation.Play();

 }

 }

 }

 function Reload () {

 if(bullets < 1) {    //if we have less than 1 bullet then we can reload
  if (totalBullets > 0)

 if(Input.GetKeyDown("r")) {

 AudioSource.PlayClipAtPoint(reloadSound, transform.position, 1); //plays reload soundclip

 yield WaitForSeconds(reloadTime); //waits for "reloadTime" before adding bullets

 bullets += reloadAmount; //adds 3 bullets to our "clip"

 totalBullets -= reloadAmount; //subtracts 3 bullets from our totalBullets amount

 ammoclip.animation.Play();

 }

 }

 }

 function OnGUI () {

 ammo.text = "bullets: " + bullets + "/" +  totalBullets.ToString();

 }