How to have BulletPrefab do the damage in instead of RayCastHit

I want the bullet prefab do the damage like have the bullet enter the collidision to decrease the enemy Hp and when the OnTriggerEnter use for PlayerInRange but when i shoot the bullet it collide with the enemy and it move, the enemy have two collider box and capsule collider which is for the PlayerInRange and i want the box for the dmage. when i a enter the enemy capsule collider i notice my health decrease instead of the bullet that the enemy instantiate, i use lookAt but when my enemy want to shoot it seem to go in the wrong direction i mean the ShotSpawnPoint, my character not getting to decrease the enemy health because i using a bullet prefab which i don't know how to tag to do the damage cause i using raycast, the bullet shoot before the raycasthit but i don't want the raycast do the damage but the bullet so i don't know what to do here my scripts.

using UnityEngine; using System.Collections;

public class PlayerShooting : MonoBehaviour {

 public int damagePerShot = 20;
 public float timeBetweenBullets = 0.15f;
 public GameObject shotPrefab;
 public float range = 100f;
 public Transform shotSpawn;
 private AudioSource playershot;
 
 
 
 float timer;
 //Ray shootRay;
 //RaycastHit shootHit;
 int ShootableMask;
 void Start ()
 {
     ShootableMask = LayerMask.GetMask ("Shootable");
     playershot = GetComponent < AudioSource> ();
 }
   
 
 void Update ()
 {
     timer += Time.deltaTime;
     if (Input.GetButton ("Fire1") && timer >= timeBetweenBullets)
     {
         Shoot ();
     }
 }
 
 void Shoot ()
 {
     timer = 0f;
     RaycastHit hit;
     Bullet ();
     Ray ray = new Ray (shotSpawn.position, transform.forward);
     if (Physics.Raycast (ray, out hit, range))
     {
         if (hit.collider.tag == "Enemy")
         //EnemyHealth enemyHealth = hit.collider.GetComponent<EnemyHealth> ();
 
         //if (enemyHealth != null)
         //{
             //enemyHealth.TakeDamge (damagePerShot);
 
         //}
         Debug.DrawRay (shotSpawn.position, transform.forward * range, Color.green);
     }
 }
 void  Bullet()
 {
     GameObject shot = Instantiate (shotPrefab, shotSpawn.position, shotSpawn.rotation) as GameObject;;
 
     playershot.Play ();
 }

}

using UnityEngine; using UnityEngine.UI; using System.Collections;

public class PlayerHealth : MonoBehaviour {

 public int startingHealth = 100;
 public int currentHealth;
 public Slider healthSlider;
 bool isDead;
 bool damaged;
 PlayerMovement playerMovement;
 PlayerShooting playershooting;
 public GameObject PlayerExplosion;
 private AudioSource playerExplosion;
 
 
 
 void Start ()
 {
     playershooting = GetComponent<PlayerShooting> ();
     playerMovement = GetComponent<PlayerMovement> ();
     currentHealth = startingHealth;
     playerExplosion = GetComponent<AudioSource> ();
 }
   
 public void TakeDamage(int amount)
 {
     currentHealth -= amount;
     healthSlider.value = currentHealth;
     if (currentHealth < 0 && !isDead) {
         Death ();
     }
    
 }
 
 public void Death () {
     isDead = true;
     Instantiate (PlayerExplosion, transform.position, transform.rotation);
     playerExplosion.Play ();
     playerMovement.enabled = false;
     playershooting.enabled = false;
 
 }
 // Update is called once per frame
 void Update () {
   
 }

}

using UnityEngine; using System.Collections;

public class EnemyAttack : MonoBehaviour {

 public float timeBetweenAttacks = 0.5f;
 public int attackDamage = 10;
 bool playerInRange;
 float timer;
 GameObject player;
 PlayerHealth playerHealth;
 EnemyHealth enemyHealth;
 public Transform shotSpawn;
 public GameObject enemyShot;
 
 void Start ()
 {
     player = GameObject.FindGameObjectWithTag("Player");
     playerHealth = player.GetComponent<PlayerHealth> ();
     enemyHealth = GetComponent<EnemyHealth> ();
 }
 
 void OnTriggerEnter(Collider other)
 {
     if (other.gameObject == player)
     {
         playerInRange = true;
     }
 }
 
 void OnTriggerExit (Collider other)
 {
   
     if (other.gameObject == player) {
         playerInRange = false;
     }
 }
 
 
 void Update ()
 {
     timer += Time.deltaTime;
     if (timer >= timeBetweenAttacks && playerInRange && enemyHealth.currentHealth > 0)
     {
         Attack ();
     }
 }
 
 void Attack ()
 {
     timer = 0f;
     Instantiate (enemyShot, shotSpawn.position, shotSpawn.rotation);
     if (playerHealth.currentHealth > 0) {
         playerHealth.TakeDamage (attackDamage);
     }
 
 }

}

using UnityEngine; using System.Collections;

public class EnemyHealth : MonoBehaviour {

 public int startingHealth = 100;
 public int currentHealth;
 public GameObject enemyExplosion;
 
 CapsuleCollider capsuleCollider;
 bool isDead;
 void Start ()
 {
     capsuleCollider = GetComponent<CapsuleCollider> ();
     currentHealth = startingHealth;
 }
   
 // Update is called once per frame
 void Update () {
   
 }
 public void TakeDamge(int amount)
 {
   
     if (isDead)
         return;
     currentHealth -= amount;
 
     if (currentHealth < 0) {
         Death ();
     }
 }
 void Death ()
 {
     isDead = true;
     capsuleCollider.isTrigger = true;
     Instantiate (enemyExplosion, transform.position, transform.rotation);
    
 }

}

using UnityEngine; using System.Collections;

public class EnemyMovement : MonoBehaviour {

 Transform player;
 PlayerHealth playerHealth;
 EnemyHealth enemyHealth;
 public float damping;
 public float Speed = 10;
 void Start () {
     player = GameObject.FindGameObjectWithTag ("Player").transform;
     playerHealth = player.GetComponent<PlayerHealth> ();
     enemyHealth = GetComponent<EnemyHealth> ();
 }
   
 // Update is called once per frame
 void Update ()
 {
     if(enemyHealth.currentHealth > 0 && playerHealth.currentHealth > 0)
     {
         lookAtPlayer ();
         Movement ();
     }
 }
 void lookAtPlayer ()
 {
     Quaternion rotation = Quaternion.LookRotation (player.position - transform.position);
     transform.rotation = Quaternion.Slerp (transform.rotation, rotation, Time.deltaTime * damping);
 }
 
 void Movement ()
 {
     transform.position = Vector3.MoveTowards (transform.position, player.position, Speed * Time.deltaTime);
 }

}