No longer obtainable through a quest, the Stranded Rebel's Weapon is nowadays considered as a rare item prized by collectors. It used to be placed in the player's inventory during the first of Lt. Commander Gins Darone's missions, an Imperial officer located in the Massassi Temple on Yavin 4. From there, it was possible to keep this item by not completing the mission. FYI: This quest is still very much doable, and the weapon is still granted in your inventory!