A quite nice job with some very interesting features. Please notices that this is NOT a real gun – it’s an airsoft replica of a FN P90.
These guys made quite an impressive job: Their turret is completly computer controlled and finds and follows it’s targets autonomously.
“Notice the tactical LED flashlight is glowing on the left side of the turret. There is absolutely no practical reason for that.”
Beside the complete building description there is also a short movie of the Sentry Gun in action on the website:
Source: Sentry Gun