I don’t know how the AMS stands for correctly, but I can say for sure that these are self-guided turrets (here without it). In total there are 6 of them on the base (on one of the screenshots there are 2 turrets in one place, you won’t have this). You just have to get under the "laser" then you are dead. Here is the video:
PS The turrets are very stupid (Well, it's still 1992 (and I'm not a scripting master)).