It may not be as sophisticated as Samsung's sentry, but for a backyard DIY project this robotic guardian is damn impressive. It's got built-in night vision and can track and shoot its targets in the heart. It doesn't look like it can do a full 360, but it's still pretty fast. Bonus video after the jump.
Home-built Robotic Sentry Gun [via New Launches]
DISCUSSION
I want one! What a way to keep those assholes off your porch. You know, the ones who leave all the ads on your doorknob. Or worse, the ones that stick the ads on your door peephole. Shoot em all!