Berezin UB

Berezin UB (УБ - Универсальный Березина, Universalni Berezina, Berezin's Universal) was a 12.7 mm caliber Soviet aircraft machine gun widely used during World War II.

Country Name Origin Year
Russia (USSR) 1937
Country Name Operational Year Retirement Year
Russia (USSR) View

In 1937, Mikhail Yevgenyevich Berezin began designing a new large-caliber aircraft machine gun chambered to the 12.7 mm round used by infantry machine guns. The new design passed factory trials in 1938 and was accepted into service in 1939 under the designation BS (Berezin Sinkhronniy, Berezin Synchronized). The rate of fire made it well suited for use as defensive armament in aircraft. While a successful design, BS was not without its faults, the biggest being its cable-operated charging which required considerable physical strength. Continued development resulted in the improved UB which came in three versions: UBK (Krylyevoi, for the wings), UBS (Sinkhronniy, Synchronized), and UBT (Turelniy, for the turret), with UBS and UBK charged by compressed air. The UB was accepted into service on April 22, 1941, just two months before the start of the German-Soviet War.

Type Heavy Machine Gun
Place of origin Soviet Union
Service history
Used by Soviet Union
Wars World War II
Production history
Designer Mikhail Yevgenyevich Berezin
Designed 1937–39
Weight 21.5 kilograms (47.4 lb)
Cartridge 12.7×108mm
Action Gas
Rate of fire 800-1050 RPM
Muzzle velocity 814–850 m/s (2,670–2,790 ft/s)
Feed system Belt
Sights Iron

End notes