I.R.I.S. Sentry Gun
“Sir, are you a Xeno?” RA-TA-TA-TA-TA-TA “Oopsie. Sorry, sir.”
The Instant Response Intelligent Security (IRIS) Sentry Gun was supposed to revolutionize the security business. A dirt cheap turret with enough A.I. to protect its sector all by itself sounded too good to be true. And it was. Unfortunately the “intelligent” part of the acronym left a lot to be desired. Left to its own devices, the turret’s A.I. was likelier to fire at its owner than at the enemy. It was quickly banned, and landfills in Mars were packed with the egg-shaped IRIS Sentry Guns.
Some of them slipped by the galaxy-wide recall, though. Urban legends soon spread of remote outposts and warehouses where an IRIS turret self-activated and mowed down everything in sight.