sentences:  M73 machine gun
  
  The M73 and M219 are 7.62 mm NATO caliber machine guns designed for tank use.NATO no longer uses them, but they were used on the M48 Patton and M60 Patton MBT series (including the M728 Combat Engineer Vehicle), and on the M551 Sheridan Armored Reconnaissance / Airborne Assault Vehicle (AR/AAV).