Naval autocannon

A naval autocannon, colloquially known as a naval coilgun and a mini-MAC, is a coilgun-equipped turret mount which is installed on UNSC warships. They typically fire guided shells against long-range targets, and inert kinetic kill rounds at short-range. It may refer to the following:
 * 11A2R1 naval coilgun battery
 * M66 Sentry autocannon
 * Mark 15 Breakwater naval coilgun
 * Mark 55 Castor naval coilgun
 * Spitfire naval coilgun battery