Editing Phalanx CIWS (section)

===Gun and ammunition handling system===
The Block 0 CIWS mounts (hydraulic driven) fired at a rate of 3,000 rounds per minute and held 989 rounds in the magazine drum.<ref name="1987 almanac"/> The Block 1 CIWS mounts (hydraulic) also fired at 3,000 rounds per minute with an extended magazine drum holding 1,550 rounds. The Block 1A and newer (pneumatic driven) CIWS mounts fire at a rate of 4,500 rounds per minute with a 1,550-round magazine. The velocity of the rounds fired is about {{convert|3600|ft/s|m/s}}. The rounds are [[Armor-piercing shot and shell|armor-piercing]] [[tungsten]] penetrator rounds or [[depleted uranium]] with discardable plastic [[Sabot (firearms)|sabot]]s. The Phalanx CIWS 20&nbsp;mm rounds are designed to destroy a missile's airframe and make it non-aerodynamic, thus keeping shrapnel from the exploding projectile to a minimum, effectively keeping secondary damage to a minimum. The ammunition handling system has two conveyor belt systems. The first takes the rounds out of the magazine drum to the gun; the second takes empty shells or unfired rounds to the opposite end of the drum.

The 20&nbsp;mm APDS rounds consist of a {{cvt|15|mm}} penetrator encased in a plastic sabot and a lightweight metal pusher.<ref>{{cite web|url=http://www.military.ir/gallery/albums/userpics/CIWS_article.pdf |archive-url=https://ghostarchive.org/archive/20221009/http://www.military.ir/gallery/albums/userpics/CIWS_article.pdf |archive-date=2022-10-09 |url-status=live|title=CIWS: The Last Ditch Defense}}</ref> Rounds fired by the Phalanx cost around $30 each and the gun typically fires 100 or more when engaging a target.{{Cn|date=April 2024}}