wheels so they can be pivoted easily. A crew of two or more is required to wind back the powerful torsion arms and position the huge bolt ready for firing. On the whole these weapons are nowhere near as large or cumbersome as stone throwers and cannons.
Bolt throwers are fired in the shooting phase along with other missile weapons. To shoot your bolt thrower first turn it on the spot so that it points towards your intended victim. The bolt travels straight forward and (hopefully) hits the first target in its path.
To determine whether the bolt strikes its target roll a D6 to hit using the crew's BS in the same way as bow shots, crossbows, and other missile weapons. The usual modifiers apply, except no penalty is imposed for turning the machine, as it is designed to be used in this way. See the Shooting section for details.
If you score a hit work out damage as described below. If you miss then the bolt hits the ground or sails into the air and comes down harmlessly somewhere else.