76 mm self-propelled anti-aircraft weapon 29-K

• Name — ZSU 29-K • Type — Anti-aircraft truck • Origin — Soviet Union • Is Ranged — yes • Is Artillery — yes • Is Vehicle — yes • Service — 1936–1941 • Used By — Soviet Union • Wars — World War II • Designer — Design Bureau (KB) Plant No. 8 • Design Date — 1935 • Manufacturer — Yaroslavl Automobile Plant • Production Date — 1935–1937 • Number — 61 units • Mass — 10.55 t • Length — 7.630 m • Width — 2.470 m • Crew — 5 • Cartridge — Fixed QF 76.2 × 558mm R • Cartridge Weight — 6.6 kg • Caliber — 76.2 mm • Rate — 10–20 rpm • Velocity — 815 m/s • Max Range — 14,600 m • Sights — Telescopic sight • Elevation — −3° to 82° • Traverse — 360° • Primary Armament — 76 mm air defense gun M1931 48 rounds • Engine — Herkules YXC • Engine Power — 93.5 hp • Pw Ratio — 8.77 hp/ton • Drive — 6×4 • Vehicle Range — 270 km • Speed — 45 km/h

In 1934, the Design Bureau (KB) Plant No. 8, named after Mikhail Kalinin, received an order to install the 76 mm air defense gun M1931 on the chassis of the three-axle YaG-10 truck. Production completed by the Yaroslavl Automobile Plant, due to their experience with creating the SU-8 (artillery). In August–September 1936, tests were carried out at the NIAP test site. The first vehicles entered service with Moscow Military District. The 29-K took part in the parade on Red Square in Moscow. The first display of motorized anti-aircraft guns took place at a military parade in Moscow on 1 May 1934. Overall, sixty-one YaG-10 trucks were converted into 29-K models. Modifications to the trucks included a reinforced undercarriage, four stabilizing legs with jacks were added to the underside, rotating pedestal for the gun, and side boards replaced with semi-circular armor plates that could be reclined in combat to create additional space for the crew to operate.