CX-2, also known as Sniper CloneX2, served under the Galactic Empire around 18 BBY. He was deployed to Teth in a mission to eliminate another clone assassin, CX-1. While his mission was successful, he also discovered the presence of the Imperial priority target Omega, and began pursuing a secondary directive to apprehend her. To do so, the assassin routinely disregarded orders provided by Imperial Clone Commander Wolffe and managed to track Clone Force 99 and the Clone Underground's remnants through Teth's jungles. After nearly drowning rogue clone Crosshair, he was stunned by another rogue clone, Howzer, and fell down a waterfall, defeated. However, he survived the fall and climbed out of the river following the escape of Omega and her protectors.