Box Collider - Trigger doesn't respond on whole gameObject

Hello. I have the basic scene, Floor, Wall (which has box collider , so if U miss the target Bullet hits this collider and bullet "Deletes"), two "Target" boxes called "Red" and "Green". The thing is, when i fire my bullet and it hit's i.e "Red", some Areas of the Box Collider doesn't respond , some areas work fine.

Box COllider is exact same size as the "Red" gameobject.

Photos:

There it not responds (Number in Red is not increasing)

There it works fine

BulletScript:

 using UnityEngine;
 using System.Collections;
 
     public class BulletScript : MonoBehaviour {
     public float duration = 1;
     public float bulletSpeed = 10;
     public PlayerScript pScript;
     public GameObject Player; 
     
     void Start()
     {
         Player = GameObject.Find("Player");
         pScript =  Player.GetComponent<PlayerScript>();
         
     }
 
     // Update is called once per frame
     void Update () 
     {
 
         transform.Translate (Vector3.forward * bulletSpeed);
     }
 
     public void OnTriggerEnter(Collider other)
     {
         if (other.gameObject.name == "Red") {
 
             pScript.redHit++;
             print("Rrrr");
                 }
         else if (other.gameObject.name == "Green") {
             pScript.greenHit++;
         }
         //Debug.Log (redHit);
         Destroy (gameObject.gameObject);                
     }
 
 }

Sorry for my English