MrMonkey, I know it stays after you're dead. But I imagine it to be more like the E-Web or spawn beacon, which lasts for a prolonged time - as long as there is a generator near it. It'd be akin to how the E-Web stays after you're dead and only goes away when you place a new one or destroy it - but it's still not overpowered because it'll quickly run out of ammo if not powered by a generator.
"One of the bitches actually gave birth while she was attacking, and her puppies joined in on the carnage."
--the awesomeness that is Boatmurdered.