Unity script not disabling after disabling gameobject attached to

I have a GameObject (HandGun) which I disable (setActive(false)) in a certain moment of the game. HandGun has a script attached to it named GunController, which takes care of shooting everytime I press the trigger.

The thing is, when I disable the HandGun, I can still shoot and see the bullet coming out of nothing, because the HandGun GameObject is successfully gone.

GunController script:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using EZEffects;
public class GunController : MonoBehaviour {

public GameObject controllerRight;
public AudioClip clip;
AudioSource sound;
public int damage;
private SteamVR_TrackedObject trackedObj;
public SteamVR_Controller.Device device;

private SteamVR_TrackedController controller;

public EffectTracer TracerEffect;
public EffectImpact ImpactEffect;
public Transform muzzleTransform;

// Use this for initialization
void Start () {
    sound = gameObject.AddComponent<AudioSource>();
    controller = controllerRight.GetComponent<SteamVR_TrackedController>();
    controller.TriggerClicked += TriggerPressed;
    trackedObj = controllerRight.GetComponent<SteamVR_TrackedObject>();
    device = SteamVR_Controller.Input((int)trackedObj.index);
}

private void TriggerPressed(object sender, ClickedEventArgs e)
{
    shootWeapon();
}

public void shootWeapon()
{
    sound.PlayOneShot(clip,0.2f);
    RaycastHit hit = new RaycastHit();
    Ray ray = new Ray(muzzleTransform.position, muzzleTransform.forward);
    device.TriggerHapticPulse(3999);



    TracerEffect.ShowTracerEffect(muzzleTransform.position, muzzleTransform.forward, 250f);

    if(Physics.Raycast(ray, out hit, 5000f))
    {
        if (hit.collider.attachedRigidbody)
        {
            Enemy enemy = hit.collider.gameObject.GetComponent<Enemy>();
            if (enemy)
            {
                enemy.TakeDamage(damage);


            }
            ImpactEffect.ShowImpactEffect(hit.transform.position);
        }
    }

}

// Update is called once per frame
void Update () {

}
}

Part of the Inspector script, which is who disables the HandGun gameobject:

public void showShop()
{
    shop.SetActive(true);
    shopActive = true;
    if (actualGun == null)
    {
        actualGun = handGun;
    }
    actualGun.SetActive(false);
    model.SetActive(true);
}

Moreover, if I deactivate the GunController script manually when the game is running, I can still shoot, which I absolutely don't understand. I'm using EZEffect which can be found on the unity store.

What am I doing wrong? What should I do?

Anyway, thank you in advance for your help!

A script can still execute code when it is on a disabled gameobject.

However the Update Function will not fire. Seeing as your GunController does not utilize its Update(), I suspect that your Input Listener is somewhere else (Probably EZEffect?).

To prevent your controller from firing, you could add a check to your code.

private void TriggerPressed(object sender, ClickedEventArgs e)
{
    if (gameobject.ActiveSelf)
    {
        shootWeapon();
    }        
}

Or you can disable the script listening for User Input