HealthScript hitingHealth;
if (Physics.Raycast (ray1, out hit, 1000f))
    {                    
        hitingHealth = hit1.transform.GetComponent<HealthScript>();
        switch(hit.transform.tag)
        {
            case "head": hitingHealth.hp -= 100; return;
            case "body": hitingHealth.hp -= 50; return;
            case "arm" : hitingHealth.hp -= 25; return;
        }