AK-47
The most widely used, copied, easy to clean and rugged fire weapon in existance - why ? Because it is simple and does what is says on the tin. If we spent less money on these moronic, high tec (read lkely to fail) answers to military requirements (are they though or toys) we might get somewhere. The merkins are great at over engined answers to simple problems. Take the original M16 it was pants: it broke, it was complex to keep clean and was not fit for combat - don't worry the Brits managed the same feat with the early SA80.
About the only possible value I can see for such a device is internal security work where you need up - to - the minute info on "marks" or whatever the palance is for people the sec forces have an interest in.
"Hi mom , eh no I can't talk right now were in the middle of a fire-fight"
AC as all you experts are lible to correct me.