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After regaining independence in 1918, the Polish Army was armed with weapons left over from the nations that occupied Poland during the Partition Era, including Russian M91 Mosin–Nagants, Austrian Steyr-Mannlichers, and German Gewehr 98s. French Berthiers and Lebels from the soldiers of the Blue Army were also on hand, as well as the Japanese Arisaka and guns from Great Britain such as the Lee–Enfield.
As a result, at the end of Polish-Soviet War in 1921, the Polish army was armed with approximately 24 types of guns and 22 rifles firing different ammunition. In an effort to reduce logistical difficulties, the Polish Army sought to adopt a single type of rifle. Conveniently, the Treaty of Versailles, having established the Free City of Danzig, gave the Polish Army access to the weapons-making facilities at the Danzig Arsenal, facilitating the choice of the Mauser 98 action as the basis for any new Polish military rifle. The Mauser was also arguably one of the best bolt-action rifles at the time and the best available to Poland. Production of the wz.98 began in July 1922, after the Danzig machinery was moved to Warsaw and creating the National Rifle Factory in Radom.
Two years later, production of the wz.98 rifles was stopped. The military sought to adopt an intermediate-length rifle, such as the Lee–Enfield, M1903 Springfield, or the German Karabiner 98a based on analyses of combat experience in World War I and the Polish-Soviet War.
Field use of the K98a rifles showed that the design was not fit for use as an infantry weapon (originally, the K98a had been developed as a weapon for auxiliary or special troops). The greatest flaw was the weak bayonet mount, as the bayonet lug would break off when hitting hard objects. The K98a also used a small-ring Mauser action, which complicated the production process. Following the postwar shift to large-ring carbines with 600 mm barrels and Gewehr 98-style bayonet lug/muzzle lengths, such as the Czech vz. 24, the decision was made to develop an intermediate model rifle for the Polish Army. The design was finalized in 1929. The new wz.29 rifle was based on the old wz.98 rifle, but with a shortened stock and barrel, stronger alloys for the receiver and barrel, a reinforced chamber, and increased dimensional tolerance in the action, allowing for easy interchangeability of parts. There were two versions of the rifle: Infantry models had straight bolt handles, while cavalry models had curved handles. Since both variations used the same stock, cavalry models had a cutout in the stock for the curved handle.
Production of the new weapons began in 1930 at the National Arms Factory in Radom. Despite the production of wz. 98a long rifles beginning in 1936, wz.29 production continued until September 1939, with a total of approximately 264,000 rifles produced, including rifles produced for export to Spain and Afghanistan.
During the September Campaign, wz.29 rifles were used by the Polish Army in the defense of Poland, against German troops using the similar Karabiner 98k. After the defeat of Poland, they were used by the guerrillas of the Polish Underground. Captured wz.29 rifles were also used by the Wehrmacht as the Gewehr 298 (p).