The US Army recognised the need for a mobile anti-aircraft gun, and had initially used various vehicles armed with single machineguns. With the adoption of the M33 twin M2HB powered mount, they had an effective weapon, and in 1942 the M33 was mounted onto the M3 Halftrack standardised as the M13 MGMC. However, within months it had become substitute standard with the adoption for the M16 MGMC armed with the more powerful M45 quad mount. This powerful anti-aircraft weapon can be compared with the Flakvierling. It can be used against aircraft, infantry and light armored vehicles as the nickname "Kraut Mower" suggests.
Also know as the SU160 ("SU" stands for Samokhodnaya Ustanovka), the ZSU M17 Multiple Gun Motor Carriage ("ZSU" stands for Zenitnaya Samokhodnaya Ustanovka) was a M16 MGMC variant based on the longer M5 halftrack chassis. The design was the same, but onlt a different chassis. This variant was sent under lend-lease to USSR by the end of 1943 to the spring of 1944. These vehicles made up a large part of the anti-aircraft vehicles used by the USSR as sophisticated designs as the ZSU-37 were late in production.