The VZ-37 was a Czechoslovakian medium machine-gun made by the Zbrojovka Brno factory from 1937 to 1945, and intended as a heavy support weapon to accompany the VZ-26. It was chambered for the 7.92 mm Mauser cartridge and was belt fed, firing with a muzzle velocity of 793 meters per second to an effective range of 1000 meters. It could be adjusted to two cyclic rates of fire; 450 and 700 rounds per minute, and was adopted by Britain, and manufactured under licence under the name 'Besa'. The VZ-37 had a 678 mm long barrel and was fitted with a blade foresight and a graduated leaf rearsight. Research VZ-37