Tech hobbyist makes shoulder-mounted guided missile prototype with $96 in parts and a 3D printer — DIY MANPADS includes assisted targeting, ballistics calculations, optional camera for tracking.

The future of modern warfare is "don't".

https://www.tomshardware.com/3d-printing/tech-hobbyist-makes-shoulder-mounted-guided-missile-prototype-with-usd96-in-parts-and-a-3d-printer-diy-manpads-includes-wi-fi-guidance-ballistics-calculations-optional-camera-for-tracking