Absolom,
Perhaps, as you say, I might be wrong, but I haven't noticed that the Glock grease contains graphite flake, which is a key component of all commercially available copper based anti-seize grease. If it were, for instance Permatex anti-seize, I would have expected to find graphite in the grease.
Also, the high viscosity of most anti-seize grease combined with its tendency to solidify in cold makes it quite unsuitable for firearms use in temperatures below about 30F.