Name: 20 × 110 mm USN
Availability: InStock

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South-eastern Asia

Singapore

Western Europe

Belgium

France

<h2>Synonyms</h2><p>20 mm US Navy Mk 100</p><h2>Armament</h2><p>US Navy Mk 11 and 12 guns; Mk 100 gun; Phalanx Close-In Weapon System (CIWS).</p><h2>Development</h2><p>This round was developed in the 1950s by the US Navy, together with the Mk 11 and 12 guns, for aircraft use. The Mk 11 was a two-barrelled revolver gun with a rate of fire of 4,200 rds/min and entered service in the late 1950s. The Mk 12 was basically an improved Hispano-Suiza with a rate of 1,000 rds/min. Both guns found their way to other countries in US supplied aircraft.</p><h2>Description</h2><p>The rimless, bottlenecked case is more or less an extended version of the 20 × 102 mm case; it carries a more powerful IMR 7013, WC 870 or WC 872 propelling charge and is electrically primed. Projectiles are conventional and weigh about 110 g. Note that this round is not interchangeable with the 20 × 110 mm HS404 round or the 20 × 110RB Oerlikon S round.</p><p>BELGIUM</p><h2>Manufacturer</h2><p>FN HERSTAL SA</p><p>Type: AP-I FN144: projectile 101 g; MV 1,030 m/s</p><p>HE-I FN143A1: Shell impact fuze; 101 g; MV 1,030 m/s</p><p>HE-I-T FN142A1: Shell with tracer self-destruction; impact fuze; 101 g; MV 1,030 m/s</p><p>TP FN140: Shell, inert; 99 g; MV 1,030 m/s</p><p>TP-T FN141: Shell, inert, with tracer; 99 g; Mv 1,030 m/s</p><p>FRANCE</p><h2>Manufacturer</h2><p>Giat Industries</p><p>Type: AP-I: An unusual compound projectile consisting of a base section which is a short, pointed,</p><p>armour-piercing, steel projectile and a forward ogive section which is hollow, filled with incendiary</p><p>material and sits on the tip of the base section. The two sections are then connected together by a thin</p><p>steel sleeve which is pressed into a groove on the base section and into the ogive at the shoulder. A</p><p>Tombak driving band is pressed into the base. 110 g; Mv 1,012 m/s</p><p>HE-I: Steel shell, filled Hexal; fuzed MR214 nose impact fuze; 110 g; MV 1,012 m/s</p><p>TP: Steel shell, empty; dummy fuze; 110 g; Mv 1,012 m/s</p><p>TP-T: Steel two-section shell, front empty, rear filled tracer; dummy fuze; 110 g; Mv 1,012 m/s</p><p>SINGAPORE</p><h2>Manufacturer</h2><p>Chartered Industries of Singapore (CIS) Type: HE-I: Steel shell, loaded Hexal; nose impact fuze; 110 g; MV 1,012 m/s AP-I: Solid steel shot with ballistic cap, filled incendiary mixture and base tracer; 100 g; MV 1,012 m/s TP: Inert projectile representing HE-I; 110 g; MV  1,012 m/s TP-T: As for TP but with base tracer; 100 g; MV  1,012 m/s UNITED STATES OF AMERICA</p><h2>Manufacturer</h2><p>Government contractors</p><p>Type: Ball-TP M55A1: Steel inert projectile; dummy fuze</p><p>HE-I M56A3: Steel shell loaded with RDX and incendiary composition; Point Detonating fuze, M505</p><p>series; 101 g</p><p>AP-I M53 : Steel pointed shell with alloy ballistic cap and filling of incendiary material</p>

The rimless, bottlenecked case is more or less an extended version of the 20 × 102 mm case; it carries a more powerful IMR 7013, WC 870 or WC 872 propelling charge and is electrically primed.

Projectiles are conventional and weigh about 110 g. That this round is not interchangeable with the 20 × 110 mm HS404 round or the 20 × 110RB Oerlikon S round. This round was developed in the 1950s by the US Navy, together with the Mk 11 and 12 guns, for aircraft use. The Mk 11 was a two-barrelled revolver gun with a rate of fire of 4,200 rds/min and entered service in the late 1950s. The Mk 12 was basically an improved Hispano-Suiza with a rate of 1,000 rds/min. Both guns found their way to other countries in US supplied aircraft. Applications include US Navy Mk 11 and 12 guns; Mk 100 gun; Phalanx Close-In Weapon System (CIWS).

20 × 110 mm USN

20 × 110 mm USN

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