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The T81 Multiple Gun Motor Carriage was a project to mount one 40mm Bofors anti-aircraft gun and two .50in machine guns on the chassis of the T65E1 Gun Motor Carriage. The T65E1 was the prototype for the M19 40mm Gun Motor Carriage, which carried four Bofors guns and had been designed as an anti-aircraft weapon, but that was used during the Korean War as an infantry support weapon. The T81 didn't enter production.