
I dunno, man, you can legally buy a tank in the US after either disabling the main gun or jumping through some hoops to get it approved as a destructive device. (Restrictions may apply to DDs by state.) I’m sure there’s plenty of ways to get a drone, and I’m sure there’s plenty of ways to use it, research wise. Imagine strapping some kind of instrumentation onto it for atmospheric measurements for example. Or aerodynamic research.