| M13 Multiple Gun Motor Carriage | |
|---|---|
 A restored M13 half-track in a museum in Den Helder | |
| Type | Self-propelled anti aircraft gun |
| Place of origin | United States |
| Service history | |
| In service | 1943–44 |
| Used by | United States |
| Wars | World War II |
| Production history | |
| Designer | White Motor Company |
| Designed | 1940–42 |
| Manufacturer | White Motor Company |
| Produced | 1942–43 |
| No. built | 1,103 |
| Specifications | |
| Length | 21 ft 4 in (6.50 m) |
| Width | 7 ft 1 in (2.16 m) |
| Height | 7 ft 8 in (2.34 m) |
| Crew | 5 (commander, driver, gunner, and two ammunition loaders) |
| Armor | 8 to 12.7 mm (0.31 to 0.50 in) |
Main armament | 2 × 0.5 in (12.7 mm) M2 Browning machine guns in a Maxson M33 turret mount |
| Engine | White 160AX, 386 in3 (6,330 cc), 6-cylinder, gasoline engine, compression ratio 6.3:1, 128 hp (95 kW) |
| Power/weight | 15.8 hp/ton |
| Suspension | Half-track, vertical volute spring for track, bogies for wheels. |
| Fuel capacity | 60 US gal (50 imp gal; 230 L) |
Operational range | 175 mi (282 km) |
| Maximum speed | 45 mph (72 km/h) |
The M13 Multiple Gun Motor Carriage (MGMC), 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 (AA) 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.