page_title: M1918 Browning Automatic Rifle
section_title: Poland
hierarchical_section_title: M1918 Browning Automatic Rifle / Variants and subsequent models / International and commercial models / Poland
caption_attribution_description: Polski: Zdzisław de Ville ps. "Zdzich", żołnierz oddziału "Jędrusiów", Okręg Radomsko-Kielecki Armii Krajowej z ręcznym karabinem maszynowym. (Fotografia pochodząca z archiwum fotograficznego Stefana Bałuka.)
context_page_description: The Browning Automatic Rifle is a family of American automatic rifles and machine guns used by the United States and numerous other countries during the 20th century. The primary variant of the BAR series was the M1918, chambered for the .30-06 Springfield rifle cartridge and designed by John Browning in 1917 for the American Expeditionary Forces in Europe as a replacement for the French-made Chauchat and M1909 Benét–Mercié machine guns that US forces had previously been issued.
  The BAR was designed to be carried by infantrymen during an assault advance while supported by the sling over the shoulder, or to be fired from the hip. This is a concept called "walking fire"—thought to be necessary for the individual soldier during trench warfare. The BAR never entirely lived up to the original hopes of the war department as either a rifle or a machine gun.
  The U.S. Army, in practice, used the BAR as a light machine gun, often fired from a bipod.
context_section_description: Production of the BAR in Belgium began only after signing an agreement with Poland (on 10 December 1927) involving the procurement of 10,000 wz. 1928 light machine guns chambered in 7.92×57mm Mauser, which are similar to the R75 variant but designed specifically to meet the requirements of the Polish army. Changes to the base design include a pistol grip, different type of bipod, open-type V-notch rear sight and a slightly longer barrel. Subsequent rifles were assembled in Poland under license by the state rifle factory (Państwowa Fabryka Karabinów) in Warsaw. The wz. 1928 was accepted into service with the Polish army in 1927 under the formal name 7,92 mm rkm Browning wz. 1928 and—until the outbreak of World War II—was the primary light support weapon of Polish infantry and cavalry formations (in 1939 Poland had a total of approximately 20,000 wz. 1928 rifles in service). Additional detail modifications were introduced on the production line; among them were the replacement of the iron sights with a smaller version and reshaping the butt to a fish tail.
  In the mid-1930s Polish small-arms designer Wawrzyniec Lewandowski was tasked with developing a flexible aircraft-mounted machine gun based on the Browning wz.1928. This resulted in the wz. 1937. Changes included increasing the weapon's rate of fire to 1,100 rounds/min, eliminating the butt stock, adding a spade-type grip to the rear of the receiver, moving the main drive spring under the barrel and, most importantly, changing the feed system. Sustained fire was practically impossible with the standard 20-round box magazine, so a new feed mechanism was developed that was added to the receiver as a module. It contains a spring-loaded, bolt-actuated lever that would feed a round from a 91-round pan magazine located above the receiver and force the round into the feed path during unlocking. The machine gun was accepted in 1937 and ordered by the Polish Air Force as the karabin maszynowy obserwatora wz. 1937 ("observers machine gun model 1937"). Eventually 339 machine guns were acquired and used as armament in the PZL.37 Łoś medium bomber and the LWS-3 Mewa reconnaissance aircraft.
caption: Polish partisan member of Jędrusie unit with Polish version of the M1918 BAR during World War II
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