Pivot gun


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a gun mounted on a pivot or revolving carriage, so as to turn in any direction.

See also: Pivot

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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(4) "C" pivot offers to a Central pivot gun emplacement where the mounting could turn a full 360 degrees.
Armstrong's protected barbette mechanical loading system for South Australia
It was a pivot gun under his command that played a key role in the surrender of Forts Hatteras and Clark at Hatteras Inlet in August 1861.
Lamson of the Gettysburg: The Civil War Letters of Lieutenant Roswell H. Lamson, U.S. Navy
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