While at university a group of friends built and successfully tested a
   simple supersonic, IR, guided missile using common amateur rocketry
   tech, servo controllers from model planes and a CO2-cooled sensor. They
   "shot" down model plane or two.

   On Wed, Aug 29, 2018, 9:20 PM juan <[1]juan.g71@gmail.com> wrote:

     On Wed, 29 Aug 2018 19:58:55 -0700
     Steven Schear <[2]schear.steve@gmail.com> wrote:
     > In a similar way that we all have 1970s era super computers in our
     pockets,
     > I am assuming, with some basis, that it's possible to affordably
     modify
     > discarded current era smartphones (with their ample computing,
     excellent
     > cameras and micomechanical motion sensors and GPS) to serve as the
     sensing,
     > attitude control and computing element for adequate daylight
     operation
     > MANPAD.
     >
             of course, and you probably can even use a $3
     microcontroller (32 bits arm...)
             however, I don't think you could call your missiles
     'stinger' because that's intellectual property owned by uncle sam.
     he would be upset if you violated his trademark.
             now joking aside, the point here is that yes, it is a good
     idea to be armed against the government, and yes armament doesn't
     have to be limited to guns. And yes, it's quite possible to combine
     'amateur' rocketry, 'amateur' chemistry and 'amateur' electronics to
     get some interesting and useful devices.

References

   1. mailto:juan.g71@gmail.com
   2. mailto:schear.steve@gmail.com