Hi,
Try this:
1. Fix your nitial turret angle, suppose it is initAngle = x
2. Fix the Min & Max angles of Turret, suppose are: MinAngle, MaxAngle
Goto eventsheet and add this event:
EVENT:
yourTurret ..Is between MinAngle and MaxAngle degrees
ACTION:
yourTurret..Set angle to initAngle degrees.
let me know the result?