Remember the Portal 2 Sentry Turret USB Desk Defender? It was a tiny toy that could detect movement and open its wings to defend your room. ytec3d has taken it to the next level by making a 3D printed scale 1:1 turret that can open/close, move its guns around, and activate a laser from its eye.
The turret uses a camera to track targets and shoot at them with 4 Nerf guns. It took over 300 hours of 3D printing to complete this. The below video shows it in action: