Breda M37

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Fucile Mitragliatore Breda Modello 1937
Breda M37.jpg
Type Heavy machine gun
Place of origin Kingdom of Italy
Service history
In service 1937 to 1960s
Used by Italy
Wars World War II, Portuguese Colonial War, current regional conflicts
Production history
Designed 1936
Manufacturer Breda Meccanica Bresciana
Produced 1937 to 1943
Number built not known
Variants Modello 38 vehicle mounted
Weight 19.4 kg
Length 1270 mm

Cartridge 8×59mm RB Breda, 7.92×57mm Mauser
Action gas-operated
Rate of fire 460 round/min maximum, 250 rounds/min sustained
Muzzle velocity 900 m/s (2,952 ft/s)
Effective firing range 1000 m
Feed system 20 round strip

The Breda Modello 37 was an Italian heavy machine gun (Mitragliatrice Breda MOD.37) adopted in 1937. It was the standard machine gun for the Royal Italian Army during World War II. The M37 was meant as company/battalion support as compared to the more troublesome M1930 meant for squad/platoon support, and proved far more effective in combat, though possessing some of the same problematic features of Breda 30.

Design and Operation[edit]

The Breda M37 was a gas-operated, air-cooled heavy machine gun. The Breda used a larger cartridge than its rivals, the 8 mm x59RB Breda. Unlike other infantry machine guns, the Breda lacked a camming mechanism for initial extraction of the cartridge case after firing, and this meant that each cartridge had to be oiled via an oiling mechanism before being fed into the chamber. This attracted dust and debris, particularly in desert environments such as found in the Royal Italian Army's World War II campaigns in Libya and the Western Desert[citation needed].

Another drawback was that the gun was fed by 20-round strips of cartridges. This limited continuous fire, as the gun could only be fired rapidly when a second crew member fed in one ammunition strip after another. The rounds still had to be oiled to stop the cases sticking in the chamber, with all the disadvantages this entailed. Another peculiarity of the design is that the spent cases were reinserted in the strip as each round was fired. The mechanical energy required to perform this function substantially reduced the rate of fire, and the weapon tended to jam whenever a case was reinserted even slightly out of line. It also meant that in the event the metal clips had to be reused, the gunner's assistant had to first remove the empty cases from the strips.

Service Use[edit]

In service, the M37 and M38 Bredas proved to be fairly reliable heavy machine guns. Perhaps because the heavy support weapons received more attention from their crews, field reports were generally positive except for jams caused by desert sand and dust, which in the Western Desert affected all infantry machine guns to some extent. The M37 Breda's slow rate of fire helped prevent overheating during continuous fire, and its powerful, heavy-bullet cartridge had excellent range and penetration. Still, this machine gun was almost twice as heavy as the German machine guns and heavier than weapons like the M1919. In fact, it was the heaviest WWII 'light' machine gun, and unnecessarly complex to use and deploy. This was another issue for Italians, whose mobility was limited by their weak truck fleet. The tripod added around 20 kg to the complex, putting it at around 40 kilograms.

The weapon remained in first-line service with Italian forces throughout the war, and captured examples were used in combat by British and Commonwealth forces, including units of the SAS[citation needed].

The M37 was also adopted by the Portuguese armed forces, who placed it into service as the Metralhadora pesada 7,92 mm m/938 Breda heavy machine gun. The Breda saw extensive service in Portugal's African colonies during the early stages of the Portuguese Colonial Wars.[1]

The Breda Modello 38 was intended for vehicle use, and was fed from a top-mounted box magazine. The Modello 38 used a pistol style grip, rather than the twin firing handles of the Modello 37. This was the main vehicle-mounted machine gun used in fighting vehicles by the Royal Italian Army.

Production ended in 1943. It was still used as a standard machine gun after the war, until it was replaced by more modern machine guns.


  1. ^ Abbott, Peter, and Rodrigues, Manuel, Modern African Wars 2: Angola and Mozambique, 1961-1974, Osprey Publishing (1998), p. 18

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