Shield X deflector shield
Prior to its capture by the Rebellion, it was an Imperial corvette known as Blade 5. It was stolen and used to ram an array of Star Destroyers docked in a shipyard. Technicians aboard the CR90 Corvette Libra modified it to lock coordinates on the shipyard, thus destroying all of the Star Destroyers in a row.
It is unknown what became of the Ram's Head as it was last seen flying into unknown space after the shipyard attack, still intact.
- Star Wars: X-wing Tour of Duty: Imperial Pursuit (First appearance)