Russia tests upgraded Citadel with 100mm naval gun for air defense

Russia has started trials of an upgraded Citadel anti-aircraft artillery system. The new version replaces the 30mm autocannon with a 100mm naval gun. Officials say mass production of both variants is now a priority. The original Citadel system used a 30mm 2A42 autocannon, firing up to 800 rounds per minute. It was already in service defending the Moscow region. A specialised 30mm airburst fragmentation shell was also developed for the system.

The latest variant swaps the autocannon for an A-190 naval gun. This 100mm weapon fires at 80 rounds per minute but releases more fragments per shell. It can hit targets up to 21 kilometres away and reach altitudes of 15 kilometres. The system is designed to engage threats on land, at sea, and in the air.

Military planners believe the 100mm version could reduce reliance on short- and medium-range air defence missiles. Both the 30mm and 100mm configurations are now slated for urgent mass production. The upgraded Citadel system expands Russia’s air defence options. Its 100mm gun offers longer range and greater fragmentation compared to the original 30mm model. Deployment plans and production timelines have not yet been announced.