Out of my need for a ground support craft/gunship I took CMT's Sparrowhawk and modified it myself. But now, after many modifications, I noticed that the vehicle's weapon can turn but the turrets on the model don't. Now I don't what them to turn, but rather to make the weapon have a limited turning angle to the point that it can only point and fire where the guns are pointing.

Except I don't how how to do so.