From The Danger Room:On the U.S.-Mexico border, the American government has been trying, with limited success, to set up a string of sensor-laden sentry towers, which would watch out for illicit incursions. In Israel, they've got their own set of border towers. But the Sabras' model comes with automatic guns, operated from afar.
The Sentry Tech towers are basically remote weapons stations, stuck on stop of silos. "As suspected hostile targets are detected and within range of Sentry-Tech positions, the weapons are slewing toward the designated target," David Eshel describes over at Ares. "As multiple stations can be operated by a single operator, one or more units can be used to engage the target, following identification and verification by the commander."
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My Comment: It will only be a question of time before such weapon systems are employed at major bases, FOBs, and sensitive military sites. In cooperation with human operators, such an array of defenses can and will be formidable.