Pivot gun

Pivot gun cannon belonging to Roberto Cofresí, a 19th-century Puerto Rican pirate

A pivot gun was a type of cannon mounted on a fixed central emplacement which permitted it to be moved through a wide horizontal arc.[1] They were a common weapon aboard ships and in land fortifications for several centuries but became obsolete after the invention of gun turrets.

  1. ^ Kiley, Kevin (2015-06-30). Artillery of the Napoleonic Wars Volume II: Artillery in Siege, Fortress and Navy 1792-1815. Frontline Books. p. 155. ISBN 978-1-84832-637-8.