A Soviet anti-aircraft gun from the World War II era. The design of this semi-automatic anti-aircraft gun was developed in the Soviet Union just before the outbreak of World War II by a team led by L. V. Lyuliev.
At the time of the German attack on the Soviet Union, 85 mm anti-aircraft guns model 1939 were already present in large numbers in the Red Army. Throughout World War II, they constituted the main type of medium-calibre anti-aircraft gun of the Soviet army. Although the 85 mm gun model 1939 was designed to destroy aerial targets, it was occasionally also used in an anti-tank role.
In addition to the Soviet armed forces, during World War II these guns were also used by the Polish People’s Army. After the end of hostilities, 85 mm anti-aircraft guns model 1939 entered service with the armies of most countries purchasing weapons from the Soviet Union. Many guns of this type remained in service for many years after the end of World War II.
| Barrel length | 55.5 calibres |
| Weight in firing position | 4900 kg |
| Horizontal range | 15500 m |
| Vertical range | 10500 m |
| Rate of fire | 20 rds/min |
| Horizontal traverse | 360° |
| Vertical traverse | -3° ÷ +82° |
| Muzzle velocity | 800 m/s |
