The infanterikanonvagn 91, lit. 'infantry cannon wagon 91', was a high mobility assault gun that was developed to meet the operational requirements of the Swedish Army. It was designed and manufactured by Hägglund & Söner and employed common components with the Pbv 302 armoured personnel carrier series. The first prototypes of the ikv 91 were completed in 1969 with production running from 1975 until 1978. In total, 212 were manufactured.

An assault gun is a type of self-propelled artillery which uses an infantry support gun mounted on a motorized chassis, normally an armored fighting vehicle, which are designed to provide direct fire support for infantry attacks, especially against other infantry or fortified positions. Assault guns were pioneered by the Soviet Union and Nazi Germany during the 1930s, initially being self-propelled guns with direct fire in mind, with Germany introducing the first purpose-built assault gun, the Sturmgeschütz III, in 1940.