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M61 Vulcan
The
M61 Vulcan
is a
hydraulically
or
pneumatically
driven, six-
barrel
, air-cooled, electrically fired
Gatling-style
rotary cannon
which fires
20 mm
rounds at an extremely high rate (typically 6,000 rounds per minute). The M61 and its derivatives have been the principal cannon armament of
United States
military
fixed-wing aircraft
for fifty years.
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