Mark 55 Castor naval coilgun

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The Mark 55 Castor naval coilgun is a large naval autocannon used by the UNSC Navy after the Human-Covenant War. It is capable of being loaded with a variety of specialized ammunition, including experimental shield-piercing shells. The Strident-class heavy frigate has five of these turrets, with three of which paired with two Mark 57 Arena point defense guns in a 'quickshot' configuration.[1]


List of appearances[edit]


  1. ^ Halo Warfleet, page 38-39