Making laser beam point in shooting direction C#

Ok, so basicly I'm making a 3d space shooter game, and I wan't to be able to shoot a laser. I have a projectile script, which I have attatched to a prefab that gets instantiated whenever I press the spacebar. My Projectile is in this case just a stretched colored capsule. The laser is moving in the direction I'm pointing, but the problem is, that my laser isn't laying down and pointing in the direction I'm shooting, its basicly standing up instead of laying down pointing towards it's target. So basicly I want this __ instead of this |. Hope it's clear what I mean.

Here is the projectile script:

void Update () { float amountToMove = ProjectileSpeed * Time.deltaTime; transform.Translate(Vector3.forward * amountToMove); Destroy(gameObject, 5);

}

And here I'm shooting my laser inside my player script:

    if(Input.GetKeyDown("space"))
        {
            Instantiate(ProjectilePrefab, transform.position, transform.rotation);
        }

I have also tried with Quaternion.identity as rotation, but doesn't make a diffrence. even if I change the standard facting direction of the beam before it get instantiated.

Hope someone can help with this Thanks in advance