From Halopedia, the Halo wiki
Type:
Naval coilgun
Rate of fire:
Varies
In service:
Human-Covenant War Post-Covenant War conflicts
The 11A2R1 naval coilgun battery[1] is a large coilgun mounted on some United Nations Space Command warships.[2]
In 2520, the Phoenix-class colony ship UNSC Spirit of Fire was outfitted with ten such weapons. During the Human-Covenant War in 2531, these weapons were often used to provide orbital fire support for the ship's crew.[Note 1] During the Battle of Trove, 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.[2]
Concept art for the guns.
The deck gun firing.
Two of the deck guns rising out of the Spirit of Fire's interior.
Spirit of Fire's deck guns deployed in Halo Wars 2.
Naval coilgun (LNT-450 • Castor) • Naval coilgun battery (11A2R1 • Mark 15 Breakwater • Spitfire) • Sentry • Gauss cannon (M65 • M68 • M68B • M70) • M92 Principle Gauss Cannon • Mini-MAC • "Super" MAC Mass drivers: Onager (Mark 2488 • Mark 2551) • Ballista