Raycast not firing

new to this, followed this video however I created my own gun in Blender. I followed everything he did but my raycast will not fire, and I'm getting no errors. also, earlier I was getting errors with Rayviewer so I just decided to delete it, can anyone help me?

using UnityEngine; using System.Collections;

public class RaycastGun : MonoBehaviour {

 public int gunDamage = 1;
 public float fireRate = .25f;
 public float weaponRange = 15f;
 public float hitForce = 100f;
 public Transform gunEnd;


 private Camera fpsCam;
 private WaitForSeconds shotDuration = new WaitForSeconds(.07f);
 private AudioSource gunAudio;
 private LineRenderer laserLine;
 private float nextFire;


 // Use this for initialization
 void Start () {
     laserLine = GetComponent<LineRenderer> ();
     gunAudio = GetComponent<AudioSource> ();
     fpsCam = GetComponentInParent<Camera> ();
 }
 
 // Update is called once per frame
 void Update () {
     if (Input.GetButtonDown ("Fire1") && Time.time > nextFire) 
     {
         nextFire = Time.time + fireRate;

         StartCoroutine (ShotEffect());

         Vector3 rayOrigin = fpsCam.ViewportToWorldPoint (new Vector3 (0.5f, 0.5f, 0));
         RaycastHit hit;

         laserLine.SetPosition(0, gunEnd.position);

         if (Physics.Raycast(rayOrigin,fpsCam.transform.forward, out hit, weaponRange))
         {
             laserLine.SetPosition(1, hit.point);
         }
         else
         {
             laserLine.SetPosition(1, rayOrigin + (fpsCam.transform.forward * weaponRange));
         }
     }
 }
 private IEnumerator ShotEffect ()
 {
     gunAudio.Play ();

     laserLine.enabled = true;
     yield return shotDuration;
     laserLine.enabled = false;
 }

}