Footage shows a Russian BMP-2M infantry fighting vehicle and an improvised, stationary air defense system based on the AK-630 naval anti-aircraft gun. The system is being used for defense against drones. The AK-630 is a Soviet-designed 30mm naval automatic gun system, featuring a single six-barreled rotary cannon (the AO-18). It is installed on a wide variety of Russian naval vessels. The AK-630 has an effective firing range of up to 4,000 meters and a rate of fire of up to 5,000 rounds per minute.