Gun locator script isnt working

it says, that this script already has a definition for HitWeapons what am i doing wrong? please give the answer in C#

  public GameObject SelectedWeapon;
  public GameObject LastSelectedWeapon;
  public GameObject GunHolder;
  
  public int PickupDistance = 6;
  public int O = 0;
  
  private bool HitWeapons = false;
  
  private Ray ray;
  private RaycastHit hit;
 
  // Use this for initialization
  void Start () 
  {
  GunHolder = GameObject.FindWithTag("GunHolder");
  }
  
  // Update is called once per frame
  void Update () 
  {
  ray = transform.camera.ScreenPointToRay (new Vector3(Screen.width / 2, Screen.height / 2, 0));
  HitWeapons = true;
  if(Physics.Raycast(ray, hit, PickupDistance))
  {
  if(hit.collider.gameObject.tag == "PickUp")
  {
  HitWeapons = false;
  SelectedWeapon = hit.collider.gameObject;
  isEquipped : boolean = CheckWeapons();
  if(lastSelectedWeapon != selectedWeapon)
  {
  if(lastSelectedWeapon != null) 
  {
  lastSelectedWeapon.GetComponent("SelectableWeapon").unSelect();
  lastSelectedWeapon = selectedWeapon;
  selectedWeapon.GetComponent("SelectableWeapon").select(isEquipped);
  }
  }
  }
  }
  
  if(!HitWeapons)
  {
  if(lastSelectedWeapon != null)
  {
  lastSelectedWeapon.GetComponent("SelectableWeapon").unSelect();
  selectedWeapon = null;
  lastSelectedWeapon = null;
  }
  }
  
  if(selectedWeapon && Input.GetButtonDown("Pickup"))
  {
  if(gunscript.takingOut)
  {
  return;
  for(i = O ; i < playerWeapons.weapons.length; i++)
  {
  if(playerWeapons.weapons[i] == selectedWeapon.GetComponent(SelectableWeapon).weapon)
  {
  return;
  }
  
  playerWeapons.weapons[playerWeapons.selectedWeapon].gameObject.BroadcastMessage("deselectWeapon");
  playerWeapons.weapons[playerWeapons.selectedWeapon] = selectedWeapon.GetComponent(SelectableWeapon).weapon;
  playerWeapons.SelectWeapon(playerWeapons.selectedWeapon);
  selectedWeapon.GetComponent("SelectableWeapon").select(true);
  }
  }
  }
  } 
  
  void CheckWeapons ()
  {
  for (i = O; i < playerWeapons.weapons.length; i++) 
  {
  if (playerWeapons.weapons[i] == selectedWeapon.GetComponent("SelectableWeapon").weapon)
  {
  return true;
  }
  }
  
  return false;
  
  }
  
  void HitWeapons ()
  {
  if(Physics.Raycast(ray, hit, PickupDistance))
  {
  if(hit.collider.gameObject.tag == "Weapons")
  {
  RayHitWeapon = true;
  }
  }
  
  if(Physics.Raycast(ray, hit, PickupDistance))
  {
  if(!hit.collider.gameObject.tag == "Weapons")
  {
  RayHitWeapon = false;
  }
  }
  }