Shooting robot problem

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1

I think something missing in the Fire() function.
Even there is no ammo the script continue to calculate the Ray and shoot robot.
I modify like this to avoid this.

protected void Fire() {
        if (ammo.HasAmmo(tag)) {
	    GetComponent<AudioSource>().PlayOneShot(liveFire);
	    ammo.ConsumeAmmo(tag);
	} else {
	    GetComponent<AudioSource>().PlayOneShot(dryFire);
	}
	GetComponentInChildren<Animator>().Play("Fire");
	
        //if there is no ammo don't shoot
        if (!ammo.HasAmmo (tag))
	    return;

	Ray ray = Camera.main.ViewportPointToRay(new
        Vector3(0.5f, 0.5f, 0));
	RaycastHit hit;
	if (Physics.Raycast(ray, out hit, range)) {
		processHit(hit.collider.gameObject);
	}
}