The 20mm Fliegerabwehrkanone 30 (Flak 30) is a German towed automatic anti-aircraft gun. The gun entered service in 1934 and was manufactured by Rheinmetall-Borsig and Mauser. It was a development of the Swiss Solothurn ST-5 cannon. The Flak 30 was "operated" by box magazines with 20 rounds each, which resulted in a low theoretical and actual rate of fire. Given the frequent jamming of this weapon and numerous failures, from 1940 it was replaced by the Flak 38 cannon, but in some units it survived until the end of World War II. Flak 30 was exported to China and the Netherlands. Technical data: range: horizontal - 4800 m, vertical - 3700 m, caliber: 20 mm, combat weight: 450 kg, rate of fire: 120 rounds / min, projectile speed: 830-900 m / s (depending on the missile).