Scouts are issued either the DC-15a Blaster Rifle or DC-15s Blaster Rifle. Long range scouting patrols were often issued Vehicle or Animal Mounts as well to enlarge their area of responsibility. Clone Mounted Troopers were trained to ride a variety of animal Mounts, Walkers, Speeder Bikes, and Airspeeders to quickly cut across the battlefield, or move from one recon point to another.
Scouts also performed as mounted cavalry, usually cutting through Droid formations from unexpected directions to support more conventional troops. Because scouts were often already in prime positions to observe high-value targets, they often acted as spotters for snipers, and while not as trained or experienced as commando snipers, were capable sharpshooters in their own right. Scouts' primary task was to locate and observe the enemy, and report that information back to their parent unit. Scouts went by a number of other names, including Lancers, BARC Troopers and ARF Troopers, each denoting a specialty or level of skill. The Grand Army of the Republic relied on their scouts to provide reconnaissance.
Homebrew Reference Book: Clone Wars Saga Edition Fan Sourcebook - Clones