Timer not working?

Unity Engine
1

Hey guys! I am using this timer script that I have used many times and have worked, but for some reason it is not working now… Please help!

void Update()
    {
        bool TimerTrue = false;
        float timer = 1;
        if (TimerTrue)
            timer -= Time.deltaTime;
        if (Input.GetKeyDown(KeyCode.Mouse0))
        {

            GameObject Temporary_Bullet_Handler;
            Temporary_Bullet_Handler = PhotonNetwork.Instantiate("projectile", Bullet_Emitter.transform.position, Bullet_Emitter.transform.rotation, 0) as GameObject;
            Temporary_Bullet_Handler.GetComponent<BulletAttributes>().Owner = this.gameObject;
            TimerTrue = true;   
            Rigidbody Temporary_RigidBody;
            Temporary_RigidBody = Temporary_Bullet_Handler.GetComponent<Rigidbody>();

            Temporary_RigidBody.AddForce(transform.forward * Bullet_Forward_Force);


            if (timer < 0)
            {
                PhotonNetwork.Destroy(Temporary_Bullet_Handler);
                TimerTrue = false;
            }
        }
    }

The bullet successfully shoots but never despawns, I would do Destroy(Temporary_Bullet_Handler, 1.0f); but I am doing multiplayer and Photon does not have that feature for some reason

2

Put the declaration of TimerTrue outside of the function, right now it will always be false at the first if, stopping the timer counting down.

3

Ah, yes didn’t read over that. things as simple as that just slip over my head
EDIT- Gonna have to redo the whole method as it is faulty