Crosshair visible

[Oussema]

hello everyone .

if is there way to make crosshair visible just for 1 weapon ??

example : for M4 , so the crosshair shows for all weapons only M4 no 

why i need this ?? : acutely i'm using Custom crosshair script with dxdrawimage , but now i'm making Traffic unit job so i need make the default Camera crosshair work and others weaopn not work !! 

please give me any solution  for that 

[Fist]

addEventHandler("onClientPlayerWeaponSwitch",root,function(pSlot,nSlot)
  if (getPedWeapon(localPlayer,nSlot) == 31) then
      showPlayerHudComponent ("crosshair",true)
  else
      showPlayerHudComponent ("crosshair",false)
  end
end);