[Michael] found a very, very cheap toy quadcopter in his local shop ... With that info in hand, [Michael] took an Arduino Nano, an nRF04L01+ transceiver, and a Wii nunchuck to build his own ...

Instead, he equipped an FPV quadcopter with a 3D printed Nerf gun ... The motors ESCs and servo is controlled by an Arduino Nano, which receives the fire command from one of the spare outputs ...