How to script shooting to trigger shooting sound

I have a script in which i shoot or “throw” boxes I can’t seem to figure out how to insert a code to play a throwing sound under my if (Input.GetButtonDown(“Fire2”)) {
If anyone knows the proper way to trigger the audio segment please let me know. Heres my whole gun script.

using UnityEngine;
using System.Collections;

public class gun : MonoBehaviour {
	public GameObject bulletPrefab;
	public float bulletImpulse = 100f;
	// Use this for initialization
	void Start () {
	// Update is called once per frame
	void Update () {
	if (Input.GetButtonDown("Fire2")) {
			Camera cam = Camera.main;
			GameObject bullet = (GameObject)Instantiate(bulletPrefab, cam.transform.position, cam.transform.rotation);
			bullet.rigidbody.AddForce( cam.transform.forward * bulletImpulse, ForceMode.Impulse);

ad this under the if(Input.GetButtonDown(“Fire2”)

  AudioSource.PlayClipAtPoint(reloadAudio,new Vector3(firePoint.position.x, firePoint.position.y, firePoint.position.z));

and ad this variable

public AudioClip fireAudio;