R5-K6/Legends
R5-K6 was an R5-series astromech droid that was built by Industrial Automaton and belonged to Garven Dreis, the leader of the Rebel Alliance's Red Squadron, an X-wing starfighter squadron that participated in the assault on the first Death Star at the Battle of Yavin. R5-K6 previously served at the Dantooine Rebel base. He was destroyed along with Dreis's X-wing when it was shot down by Darth Vader[1].
Behind the scenes

Often given a fanon designation, Hasbro made one such name canon when it identified the droid belonging to Garven Dreis as R5-K6 in a preview of its 2009 releases. On February 1, 2009, Hasbro released the Scramble on Yavin Battle Pack as part of the Star Wars: The Legacy Collection action figure sets.[2]
R5-K6 can be seen in his droid socket in scenes filmed from the cockpit of Garven Dreis' X-wing, as well as behind Luke Skywalker in the briefing room scene prior to the Battle of Yavin.[1]
Appearances
- Star Wars: Episode IV A New Hope (First appearance)
Sources

Star Wars Customizable Card Game – Rebel Leader Pack (Card: Red Leader in Red 1) (backup link)
Star Wars: The Legacy Collection (Pack: Battle Packs: Scramble on Yavin) (backup link not verified!) (First identified as R5-K6)
- File:StarWarsLCG Logo.png Star Wars: The Card Game – Core Set (Card: Astromech Droid Upgrade)
- File:FFGXWMG.png Star Wars: X-Wing Miniatures Game – X-Wing Expansion Pack (Card: R5-K6)
Yavin 4 Rebels Guardians of the Hidden Fortress on StarWars.com (backup link)
Like the Force, Astromechs are Everywhere in Star Wars on StarWars.com (backup link)