Small arms fire is effective against the shahed drones in daytime https://en.defence-ua.com/news/how_ukrainian_soldiers_shot_shahed_136_drones_with_own_guns_at_night-5203.html
But how about a CIWS chambered in 5.56, 7.62 or 12.7? At least the first two rounds are extremely cheap compared to SAMs. So antidrone miniguns should theoretically work, but what have I missed? Why aren’t we building the guns/targeting systems?
I feel like IFF would be tricky.
I also wonder if a smaller system based on this using birdshot shells would be a viable system for smaller scale point defense.