Try This at Home: Nerf Sentry Gun - Bell of Lost Souls
Automatic Nerf Sentry in action - YouTube
Nerf Sentry Gun...Be Afraid - YouTube
Nerf Sentry Gun. A cosmetically modded Nerf Vulcan running off two 9v batteries. - Album on Imgur
Heads Up Display (HUD) Control for Nerf Vulcan Sentry Gun : 4 Steps (with Pictures) - Instructables
John Park retrospective: Auto Nerf Sentry Gun @arduino @nerfnation @johnedgarpark « Adafruit Industries – Makers, hackers, artists, designers and engineers!