For all of those gun infringers out there. This is a 3D printed rocket that is launched from a PVC shoulder fired launcher. Think AT4.
While they did not achieve a successful hit on target with the high explosive rocket (think tannerite), they did have a few successful launches and it is clear that with a little more testing they will have something more reliable.
I’ve thought about simple mortars using black powder with a System On Chip to cause an ignition at some distance over ground. What goes up, must come down and the amount of time it takes to go up tells you how long it will take to come down and it is pretty simple math to figure out how to calculate a distance. I.e. no fancy radar or anything like that.