I think they mainly do it for cheaper-per-shot defence against badly equipped armies. Which means they don't like spending a lot of bullets on the phalanx syste

I think they mainly do it for cheaper-per-shot defence against badly equipped armies. Which means they don't like spending a lot of bullets on the phalanx system to counter enemy artilety in middle east, and it doesn't rain much in the desert anyway, so they're good to go. They can also have applications in high-altitudes and in space. Maybe to take down MRVs? That makes a lot more sense actually.