 The M16 Multiple Gun Motor Carriage , also known as the M16 Half @-@ track , was an American self @-@ propelled anti @-@ aircraft weapon built during World War II . It was equipped with four 0 @.@ 5 inch ( 12 @.@ 7 mm ) M2 Browning machine guns in a M45 Quadmount . 2700 were produced by White Motor Company from May 1943 to March 1944 , with 568 M13 <unk> and 109 T10 Half @-@ tracks being converted into M16s as well . 
