unity changing weapons.prefab issues - unity3d

Question

So i'm trying to change weapons for my 2d top down space shooter. by weapon I just mean my bullet prefab so it shoots a different bullet which I can then add damage to etc.
here is the code I have. when I press number 2 it shoots my prefab clone in the hierarchy but its greyed out and nothing shows up in the game view. Below is my playerShoot code.
public class playerShoot : MonoBehaviour {
public Vector3 bulletOffset = new Vector3 (0, 0.5f, 0);
float cooldownTimer = 0;
public float fireDelay = 0.25f;
public GameObject bulletPrefab;
int bulletLayer;
public int currentWeapon;
public Transform[] weapons;
void Start () {
}
void Update () {
if (Input.GetKeyDown(KeyCode.Alpha1)){
ChangeWeapon(0);
}
if (Input.GetKeyDown(KeyCode.Alpha2)){
ChangeWeapon(1);
}
cooldownTimer -= Time.deltaTime;
if (Input.GetButton("Fire1") && cooldownTimer <= 0){
cooldownTimer = fireDelay;
Vector3 offset = transform.rotation * bulletOffset;
GameObject bulletGO = (GameObject)Instantiate(bulletPrefab, transform.position + offset, transform.rotation);
bulletGO.layer =gameObject.layer;
}
}
public void ChangeWeapon(int num){
currentWeapon = num;
for (int i = 0; i < weapons.Length; i++){
if (i ==num)
weapons[i].gameObject.SetActive(true);
else
weapons[i].gameObject.SetActive(false);
}
}
}

Answer 1

Keeping the rest of the code same, just change the following line
GameObject bulletGO = (GameObject)Instantiate(bulletPrefab, transform.position + offset, transform.rotation);
to
GameObject bulletGO = (GameObject)Instantiate(weapons[currentWeapon].gameObject, transform.position + offset, transform.rotation);
What the change does is use the transforms for the weapons in your weapon array, rather than using the bulletPrefab.
The problem occured because you were Instantiating a single prefab, which was the same as the Transform you used for the first element in your weapons array. So, when you call ChangeWeapon(1), the prefab would get deactivated. This reulted in inactive GameObjects being instantiated.
What I would suggest you do is to have two separate prefabs and spawn those accordingly.