"Buyan-M has a sufficient number of air defense assets. It is the AK-630M2 Duet system. The AK-630M2 Duet was created in russia in the late 2000s by combining two six-barrel AO-18 cannons mounted on the body of the AK-630M1-2 Roy system." en.defence-ua.com/news/fpv_dro...