11A2R1 naval coilgun battery

This unidentified deck gun is a large magnetically accelerated weapon mounted on some United Nations Space Command warships. Given its appearance, it is likely based on railgun technology.

Service history
In 2520, the  was outfitted with approximately twenty such weapons. During the Human-Covenant War in 2531, these weapons were often used to provide orbital fire support for the ship's crew. During the Battle of Shield 0459, these cannons were used to defend against a Covenant CPV-class heavy destroyer, as well as numerous Spirit dropships and their Banshee escorts, while the ship's Marine and Spartan complement fended off boarders and repaired the drive core.

List of appearances

 * Halo Wars
 * ''Halo: Fleet Battles