Just a simple toy. It is a spinning drone or RC dropped dummy bomb. Dropped from an adequate height it will spin stabilize and whistle INCREDIBLY loudly. Don't get yourself in trouble and drop in a SAFE place.
I fill the nose up with lead shotgun shot to make it front heavy and fall faster due to a better drag coefficient. I hold the shot in place with hot glue.
Be safe and have fun!
Find a video with audio on my instagram page @curtburtcurt