Simplify the following text for a Grade 8 native English-speaking person.
Original: The Browning .50 caliber machine gun has been used extensively as a vehicle weapon and for aircraft armament by the United States from the 1920s to the present day .
Simplified: The Browning .50 caliber machine gun has been used as a vehicle weapon and for aircrafts by the United States from the 1920s to the present day .