I`ve found that some people got one and some people didn`t, because I was lucky to have received one i found if there was ever a leak it was to be tightened at the pin,
or to unscrew with that allen key to replace an "O" ring at the bottom of pin,
I`ve had dozens of these regs and they`ve all been great, very easy to work with.
as long as you`ve got the Hollow Allen Key.
Try Lips above Mate.