If the Russians have we most likely have something just as good or better.
And lots more of them. A million such drones could depopulate a city better than a neutron bomb.
Our F35 fighters are already equipped to manage drone swarms. See https://www.telegraph.co.uk/news/2019/02/11/drone-swarms-led-f-35-jets-will-confuse-overwhelm-britains-enemies/