How to fire bullets from multiple guns at the same time?

I have a fighter jet which has 6 guns in it. I want to fire bullets with all six guns at the same time when i hit fire. The script used to fire bullet with 1 gun is attached below:

public class bullet_fire : MonoBehaviour {

 public GameObject Bullet_Emitter;

 public GameObject Bullet;

 public float Bullet_Forward_Force;
 
 // Use this for initialization
 void Start () {
 
 }
 
 
 // Update is called once per frame
 void Update () {
     if(Input.GetButtonDown("Fire1"))
     {
         GameObject temp_bullet_hsndler;
         temp_bullet_hsndler = Instantiate(Bullet, Bullet_Emitter.transform.position, Bullet_Emitter.transform.rotation) as GameObject;
         temp_bullet_hsndler.transform.Rotate(Vector3.left * 90);

         Rigidbody temp_rigidbody;
         temp_rigidbody = temp_bullet_hsndler.GetComponent<Rigidbody>();
         temp_rigidbody.AddForce(transform.forward * Bullet_Forward_Force);
         Destroy(temp_bullet_hsndler, 3.0f);
     }
 }

}