A Clone X trooper designated as Sniper CloneX4 served around the temporal period of 18 BBY, equivalent to the year. He was among the Clone X operatives, including Sniper CloneX3, Sniper CloneX5, and another Clone X trooper, activated under the command of Dr. Hemlock with the mission to apprehend Clone Force 99, who had successfully infiltrated Tantiss Base. Within the dilapidated science hangar of Tantiss Base, Sniper CloneX4, alongside CX-2, Sniper CloneX3, and Sniper CloneX5, engaged Hunter, Wrecker, and Crosshair. The CX squad ultimately subdued and captured the members of Clone Force 99. During the events of the final battle, Sniper CloneX4 met his demise at the hands of Echo and Wrecker, along with his fellow troopers, save for the final Clone X trooper, who was eliminated by Vik.
The initial appearance of Sniper CloneX4 occurred in "The Cavalry Has Arrived," which served as the fifteenth and concluding episode of Star Wars: The Bad Batch's third season, debuting on May 1, 2024. While the character's specific designation remained unmentioned within the episode itself or its associated credits, official promotional materials released by Walt Disney Studios through Getty Images identified him. It is important to note, however, that the image's caption does not definitively distinguish between the individual Clone X troopers.