[weswood]

I doubt it's gun specific keys. The Wather I mentioned is just a piece of plastic with a notch cut in the end, like an arrow nock. Anybody with a dowel and a sharp knife could whittle one in less than 5 minutes.

I don't know what the association between Walther & Smith & Wesson, but the S&W name is engraved on the pistol and on the paperwork.

I think it's more of a child safety device than a real security measure.