The 29K was a self-propelled anti-aircraft weapon used by the Soviet Union, consisting of a 76 mm air defense gun M1931 mounted on a YaG-10 truck.

8 [ru], named after Mikhail Kalinin, received an order to install 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 [ru].

The first display of motorized anti-aircraft guns took place at a military parade in Moscow on 1 May 1934.

Modifications to the trucks included a reinforced undercarriage, rotating pedestal for the gun, and side boards replaced with semi-circular shields.