M16 Half-Track & M45 Quadmount 52 M16 Half-Track & M45 Quadmount The M16 Half-Track with an M45 Quadmount was an armored vehicle used by the United States, the British Empire and the other Allies during World War II and the Cold War. The M16 Half-Track with an M45 Quadmount was an armored vehicle used by the United States, the British Empire and the other Allies during World War II and the Cold War. Related Humvee GMV Humvee 5-Ton