Stak was an ARF Trooper of Lightning Squadron during the Clone Wars. During the Battle of Ryloth he was placed under the command of Commander Ponds and Jedi General Mace Windu. He was commonly seen fighting alongside Razor and the rest of Lightning Squadron.
Stak wore slightly customized ARF Trooper armor with two blue, vertical lines on the left side of his helmet. He was also equipped with a DC-15S Blaster Carbine and used an AT-RT as his primary vehicle.
Battle of Ryloth
Stak participated in the Battle of Ryloth. Whilst taking over the command station in the Capital, they were attacked by battle droids and two commando droids. The batle droids were defeated easily, but the commandos each attacked him and fellow trooper Razor. Neither could take out the droid on themselves, so they took out each others'.