Bolt throwers, or Spear Chukkas as Goblins call them, are common devices in the Greenskin forces. They are usualy powered by twisted Squig hide ropes, creating the tension required to fire the great bow. They are not as sturdy or nearly as accurate as their Elven counterparts, but they do make up for this in numbers!
The Goblin Spear Chukka blister contains one complete Spear Chukka with crew.