How to create spawnPoint for bullet shoot

hello all
i am going to develop an 3d game where i want to fire bullets by gun
i have searched for fire and also using a simple code for firing the bullet
following code is working but i dont know how to create spawnPoint
var BulletPrefab :Transform;
var force : float = 2;

function Update() 
{ 
	if(Input.GetButtonDown("Fire1")) 
	{ var bullet = Instantiate(BulletPrefab,GameObject.Find("spawnPoint").transform.position,Quaternion.identity);
		bullet.rigidbody.AddForce(transform.forward * force);

} }

Make an empty game object then rename it to “spawnPoint”. Note you want to place this point just in front of your gun barrel and make it a child of the barrel so that it rotates when you aim the gun.