Berezin UB

Berezin UB

 Berezin UB

  Berezin UB

 Berezin UB

Description
The Berezin UB is a gas-operated air-cooled machine gun chambered to the Soviet 12.7 x 108 mm infantry machine gun round. Ammunition is supplied via a disintegrating link belt with a unique system in which each new round helps to extract the spent cartridge. Another unusual feature is that the belt is advanced during the return of the moving portion of the gun and not during the recoil. Turret installations were charged manually, while wing and synchronized versions utilized pneumatic charging.
The UB in all variants was used by the vast majority of Soviet military aircraft of World War II.