Missouri's main battery consisted of nine 16 in (406 mm)/50 cal Mark 7 guns, which could fire 2,700 lb (1,200 kg) armor-piercing shells some 20 mi (32.2 km). Her secondary battery consisted of twenty 5 in (127 mm)/38 cal guns in twin turrets, with a range of about 10 mi (16 km). With the advent of air power and the need to gain and maintain air superiority came a need to protect the growing fleet of allied aircraft carriers; to this end, Missouri was fitted with an array of Oerlikon 20 mm and Bofors 40 mm anti-aircraft guns to defend allied carriers from enemy airstrikes. When reactivated in 1984 Missouri had her 20 mm and 40 mm AA guns removed, and was outfitted with Phalanx CIWS mounts for protection against enemy missiles and aircraft, and Armored Box Launchers and Quad Cell Launchers designed to fire Tomahawk missiles and Harpoon missiles, respectively
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/88123769@N02">Bernard Spragg. NZ</a> from Christchurch, New Zealand
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/volvob12b/10764849303/">16 in 50 caliber guns "Mussouri"</a>