Just like some other elite clone troopers, including AT-TE gunners, they received training from ARC troopers. Their training consisted of extensive accuracy tests and assessments of their stealth and survival skills. Many troops were rejected from the program, but the end result was a set of extremely skilled snipers. The snipers became especially useful when the less numerous clone commandos were unavailable. Clone snipers usually operated within units of troopers, breaking off from the group when they were needed for important jobs, such as assassination or elimination of powerful enemies.