Castor naval coilgun

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 has five of these turrets, with three of which paired with two Mark 57 Arena point defense guns in a 'quickshot' configuration.

List of appearances

 * Halo 4
 * Spartan Ops
 * Halo: Escalation
 * Halo 2 Anniversary
 * Halo 5: Guardians