This is Samsung's upcoming machine-gun equipped sentry robot. For only about 200G's you too can have one of these automated soldiers guarding your castle.

Doesn't anyone but me see the inherent idiocy in giving software a 5.5mm machine gun? How about Robocop? Terminator?

A simple glitch, and grandma tottering up the driveway gets ventilated by your new toy. OR, the bad guys hack your fancy R2D2 and now you're on the receiving end.

There's a video here.