Weapon attack script

using UnityEngine;
using System.Collections;

public class WeaponAttack : MonoBehaviour {
    GameObject bullet,curWeapon;
    bool gun = false;
    float timer = 0.1f, timerReset = 0.1f;
    PlayerAnimate pa;
    SpriteContainer sc;

    float weaponChange = 0.5f;
    bool changingWeapon = false;

    // Use this for initialization
    void Start () {
        pa = this.GetComponent<PlayerAnimate> ();
        sc = GameObject.FindGameObjectWithTag ("GameController").GetComponent<SpriteContainer> ();
    }

    // Update is called once per frame
    void Update () {
        if (Input.GetMouseButton (0)) {
            attack ();
        }

        if (Input.GetMouseButtonDown (0)) {
            pa.resetCounter ();
        }

        if (Input.GetMouseButtonUp (0)) {
            pa.resetCounter ();
        }

        if (Input.GetMouseButtonDown (1) && changingWeapon == false) {
            dropWeapon ();
        }

        if (changingWeapon == true) {
            weaponChange -= Time.deltaTime;
            if (weaponChange <= 0) {
                changingWeapon = false;
            }
        }
    }
    public void setWeapon(GameObject cur, string name, float fireRate, bool gun)
    {
        changingWeapon = true;
        curWeapon = cur;
        pa.setNewTorso (sc.getWeaponWalk (name), sc.getWeapon (name));
        this.gun = gun;
        timerReset = fireRate;
        timer = timerReset;
    }
    public void attack ()
    {
        pa.attack ();
    }
    public GameObject getCur()
    {
        return curWeapon;
    }
    public void dropWeapon ()
    {
        if (curWeapon != null) {
            curWeapon.transform.position = this.transform.position;
            curWeapon.SetActive (true);
            setWeapon (null, "", 0.5f, false);
        }
    }
}