K9000 Mod - Resla Roil

 is a weapon mod for the K9000 cyberdog gun in the Fallout: New Vegas add-on Old World Blues.

Location
On a terminal upstairs in the X-13 Stealth testing area.

Behind the scenes

 * It could be a reference to Astro the dog from the Jetsons or the Scooby Doo series as it is called "resla roil" instead of tesla coil, as both dogs change many words to start with an "R" sound.