Terrifying, but similar systems have been built numerous times. Even a few systems that have autonomous capabilities.
It's pretty trivial to build something similar in a stationary format that you could place a few dozen of around your compound, too. Automated turret rifles with elevated positions > a bunch of quadrupeds with automated turret rifles.
Also it's FLIR based, which means jamming is only a matter of setting up heat decoys. If it has backup IR sensors, use IR lights.
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