The 4M quad 7.62mm Maxim anti-aircraft truck was a

Self-propelled anti-aircraft weapon An anti-aircraft vehicle, also known as a self-propelled anti-aircraft gun (SPAAG) or self-propelled air defense system (SPAD), is a mobile vehicle with a dedicated anti-aircraft capability. Specific weapon systems used include machine guns, ...

developed by the

Soviet Union The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, it was nominally a federal union of fifteen national ...

in 1938, based on the

GAZ-AAA The GAZ-AAA was a truck produced by GAZ. From 1936 to 1943, 37,373 units were built. Like the GAZ-AA and GAZ-MM it was largely based on the Ford Model AA truck. References External links GAZ-AAA in the Vladivostok Museum of Automotive Anti ...

truck platform.

History

In 1928, Fedor Tokarev developed a quad mount for the 7.62×54mmR PM M1910 machine gun for use as a light anti-aircraft weapon, which was adopted in 1938 as the 7.62mm M.1931 4M ZPU. The 4M ZPU was mounted on a GAZ-AAA truck to create a mobile AA weapon.

Specifications (7.62 mm M.1931 4M ZPU)

*Crew 3 (Commander, Gunner & Loader) *Elevation: -10° to +85° *Traverse: 360° *Gun Sight: Ring *Gun Mount: Rotating metal frame *Weight: 460 kg *Rate of Fire: 2.400 r.p.m. *Maximum Ceiling: 1.400 m *Maximum Ground Range: 1.600 m

Variants

Later versions of the anti-aircraft truck equipped the

12.7×108mm The 12.7×108mm cartridge is a 12.7 mm heavy machine gun and anti-materiel rifle Cartridge (firearms), cartridge used by the former Soviet Union, the former Warsaw Pact countries, modern Russia, China and other countries. It was invented in 1934 ...

DShK The DShK 1938 (Cyrillic: ДШК, for russian: Дегтярёва-Шпагина Крупнокалиберный, Degtyaryova-Shpagina Krupnokaliberny, links=no, "Degtyaryov-Shpagin large-calibre") is a Soviet heavy machine gun with a V-shaped but ...

machine gun. The quad-Maxim mount was also used on the 4x2

GAZ-MM The GAZ-MM is a medium-duty truck ( Class 4- Class 5) produced at the Gorki Auto Plant from 1938 to 1948, and then at the Ulyanovsky Auto Plant, up to 1956. The truck was a modernized variant of the GAZ-AA truck, but using the engine from the G ...

and GAZ-60 half-tracks.

References

{{DEFAULTSORT:4M (artillery) Self-propelled anti-aircraft weapons of the Soviet Union Military vehicles introduced in the 1930s