https://www.youtube.com/watch?v=4m6dldvNECI (heart attack gun)
https://www.youtube.com/watch?v=BVF8YGFcJWU (electronic weapons)
https://www.youtube.com/watch?v=jT9-Z_p84b0 (active denial system)
it's not hard to find out since it's all public domain. the discovery is a trivial search away, and there are a lot of threads you can start pulling on which eventually leads to to books written by pseudo-credible people with some alphabet intelligence agency background.
here's the catch, verification is nearly impossible. what is a prototype, what is in production, what is just a rough sketch idea of something that was never implemented, what is wild fantasy. in the game of secrecy and asymmetric information, it pays to be deceptive and ambiguous. to the point most of the people publicly discussing these topics are they themselves compromised and largely act as misdirection.
you are not need to know.