Hi here is another interesting tutorial [www.vaduunlabs.com/index.php/en/tutorials/29-adv-turret-animation][1].
“With the help of this tutorial, you will be able to animate turrets in UE4, which are always tracking the target correctly, regardless of their own orientation.”
http://www.vaduunlabs.com/index.php/en/tutorials/29-adv-turret-animation