Killtech
Discutator
That seems a little silly/imbalanced. How likely is the AI (or hell, another player) going to give you a one-of military item that builds incredibly advanced weapons? Guess that's another change to national wonder for my personal build, though it doesn't help anyone else.
or it should work as 'Manhattan Project' that enables alls civs to build these units after it's discovery. resource can be traded then without giving your neighbour a powerful weapon to strike you. (though might still boost production somewhat)