page_title: M13 Multiple Gun Motor Carriage
section_title: Prototypes
hierarchical_section_title: M13 Multiple Gun Motor Carriage / Prototypes
context_page_description: The M13 Multiple Gun Motor Carriage, otherwise known as the M13 half-track, was a self-propelled anti-aircraft gun used by the U.S. Army during World War II that was armed with two .50 caliber M2HB heavy-barrel Browning machine guns. Developed in response to a requirement for a mobile anti-aircraft vehicle, the vehicle was produced by the White Motor Company between July 1942 and May 1943. The only time it was ever used in combat was when the Americans landed at Anzio in January 1944. It was replaced by the more heavily armed M16 Multiple Gun Motor Carriage in April 1944.
  The M13 evolved from a series of several unsuccessful prototypes that were trialed from 1940 to 1942. Of these, the T1E4 was selected and given the official name of the M13 MGMC, before being placed into production. Half of the M13s produced were converted into M16s on the production lines.
context_section_description: T1 – This variant used two M2 Browning heavy machine guns on a Bendix mount on a 4×4 truck. This model, like most of the others, was a prototype. It was tested in June–July 1941 at the Aberdeen Proving Grounds, but was rejected because of the "excessive dispersion of ammunition".
  T1E1 – Another prototype that used the Bendix mount on a M2 half-track car. It was cancelled in April 1942.
  T1E2 – This variant was essentially the same as the T1E1 except the Bendix mount was replaced with the M33 Maxson mount. After the M33 was replaced with the M45 Quadmount it was accepted as the M16 half-track.
  T1E3 – A T1E1 with a Martin turret designed for use on bombers.
caption: The M13 Multiple Gun Motor Carriage.
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