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Both the M113 APC (used as an ACAV in Vietnam) and the M551 Sheridan tank (Airborne Armored Assault Reconnaissance Vehicle) were both new in Vietnam; 1962 and 1969 respectively. Both were constructed of aluminum (the Sheridan's turret & 152mm main gun were steel) and both were equipped with Browning .50 caliber machineguns.

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14y ago

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