how can i do in VR durability on weapons ?

Unity Engine
1

hi i need to know how can i make a script to deduct the maximum durability when hitting and then it will break up (disappear)?

2 
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Durability : MonoBehaviour
{
    public float maxDurability = 100.0f;  // max durability
    public float curDurability;   // current durability
    public GameObject gameObject;
    // Start is called before the first frame update
    void Start()
    {
        curDurability = maxDurability;
    }

    // Update is called once per frame
    public void HitSomething()
    {
        curDurability -= 5;

        if (curDurability <= 0){

          
         Destroy(gameObject);
          

        }
    }

}

this script doesn’t work for me what about it?