Name: 20 × 139 mm
Availability: InStock

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Round length

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Bourrelet diameter

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Sub-Saharan Africa

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Latin America and the Caribbean

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Southern Europe

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<h2>Synonyms</h2>20 mm Hispano-Suiza HS 820<h2>Armament</h2>Hispano-Suiza HS820; Oerlikon KAD, KAD-B; Rheinmetall Rh202; US M139 ; French M693/F2; Mauser Model B.<h2>Development</h2>Developed by Hispano-Suiza in the late 1940s as a more powerful replacement for the wartime 20 × 110 mm round. The new weapon which accompanied it, the HS820 gun, became one of the most successful 20 mm designs ever made and was widely purchased throughout the world as an aircraft and ground weapon. As a result of this wide distribution the cartridge was adopted by other designers who developed suitable guns, notably the German Rheinmetall Rh202, the French M693 and the US M139 .<h2>Description</h2>The rimless, bottlenecked case may be of steel or brass and is percussion primed. A wide variety of projectiles has been made across the years, but those listed below are the current manufacturing standards. Propelling charges are generally regulated to give a muzzle velocity of 1,040 m/s in a 95 calibre barrel.ARGENTINA<h2>Manufacturer</h2>Direccion General de Fabricaciones MilitaresType: HE-I: Steel shell with sintered iron driving band, loaded explosive/incendiary mixture; noseimpact fuze with self-destruction between 3.5 - 10 seconds; 122 g; MV 1,041 m/sAP-T: Hard core, light body, sintered iron driving band; 114 g; MV 1,090 m/s. Steel cartridge caseTP: Steel shell, sintered iron driving band; inert aluminium fuze; 122 g; MV 1,041 m/sTP-T FMK 8 Mod 0: Steel shell with inert loading and tracer capsule; inert fuze; percussion primed;317 g; MV 1,041 m/sFRANCE<h2>Manufacturer</h2>Giat IndustriesType: HE-I: Steel shell filled 10 g explosive/incendiary mixture; fuzed MR26 impact fuze; 120 g; MV1,050 m/sHE-I: As above but fuzed MR201B impact fuze with self-destruction between 3.5 - 9 seconds; 120 g;Mv 1,050 m/sHE-I: As above but fuzed MR203B delay impact fuze with self-destruction after 3.5 - 9 seconds; 120 g;MV 1,050 m/sHE-I-T: Two-section steel shell, front section filled 8.5 g explosive/incendiary mixture, rear sectionfilled red tracer; fuzed MR26 impact fuze; 120 g; MV 1,050 m/sHE-I-T: As above but fuzed MR201B impact fuze with self-destruction between 3.5 - 9 seconds; 120 g;Mv 1,050 m/sHE-I-T: As above but fuzed MR203B delay impact fuze with self-destruction after 3.5 - 9 seconds; 120g; Mv 1,050 m/sAP-I: Hard core in light-alloy body with ballistic cap filled incendiary mixture; 112 g; MV 1,100 m/sAP-T: As above but without incendiary filling and body bored for red tracer; 112 g; MV 1,100 m/sAP-I-T: As for AP-I but with body bored for red tracer; 112 g; MV 1,100 m/sSAP-HE-I: Pointed shell with ballistic cap, filled explosive/incendiary mixture and with base delayfuze MR205 giving self-destruction between 3.5 - 8 seconds; 120 g; MV 1,050 m/sTP: Body of HE-I shell, empty; dummy fuze; 120 g; Mv 1,050 m/sTP-T: Body of HE-I-T shell, front section empty; dummy fuze; 120 g; MV 1,050 m/sGERMANY<h2>Manufacturer</h2>Diehl GmbHType: Shrapnel DM 111: A hollow shell containing an ejection charge in the base, above which is anejection tube and an extension tube. Within these tubes are a number of heavy metal balls. The nose ofthe shell is closed by a ballistic cap. The shell base contains a striker, cap and delay element. On firing,gas pressure drives the striker forward to fire the cap and ignite the delay. After about 40 ms the delayignites the ejection charge. The ejection tube is then forced forward; this presses on the extension tubewhich shears off the shell nose cap and allows the two tubes and the shot to be ejected. The extensiontube is prefragmented and shatters to add to the effect. The ejection tube is retarded, permitting the ballsto fly free on a cone with an angle of about 3º. About 120 fragments are produced, capable ofpenetrating 2 mm F40 dural at 70 m range. 118 g; MV 1,055 m/sHE-I M599: Steel two-section shell, front loaded HE, rear loaded red tracer burning 3.4 seconds; noseimpact fuze M594 providing self-destruction after 5.5 (±1.5) seconds, or M594A1 providingself-destruction after 5.75 (±2.25) seconds. 122 g; MV 1,045 m/sHE-I DM 81: As M599 but longer shell body and shorter fuze, giving better explosive capacity.Self-destruction by nose fuze after 3.1 or 5.7 seconds nominal time. 120 g; MV 1,055 m/sHE-I DM 101: Pointed piercing shell with ballistic cap containing incendiary composition; shell filledHE; base fuze giving self-destruction after 3.1 or 5.7 seconds nominal time. 120 g; MV 1,055 m/sTP-T DM 48A1: M599 shell body, front filled inert, rear filled red tracer; dummy fuze; 122 g; MV1,045 m/sBlank: Special training round produced by Rheinmetall for use in a special training barrel. Theprojectile body has a crimped nose that ruptures only when the necessary pressure has been produced tooperate the gun fully automatically. The projectile body remains secured to the case on ejection. Roundweight approx 230 g; case content weight 15 g<h2>Manufacturer</h2>Rheinmetall GmbHType HE-I: Steel shell filled 6.5 g HE-Incendiary composition; nose impact fuze; 120 g; MV 1,045 m/sHE-I-T DM 81: Steel two-section shell, front filled HE-Incendiary composition, rear filled red tracer;nose impact fuze; 120 g; MV 1,045 m/sAP-I-T DM 43A1: Hard subprojectile in steel body, light alloy ballistic cap with incendiary filler, redtracer; 111 g; MV 1,100 m/s. Penetrates 32 mm armour at 1,000 mAPDS-T DM 63: Tungsten carbide subprojectile in light alloy/plastic sabot, red tracer; 108 g; MV1,150 m/sTP DM 48: Steel two-section shell, filled inert; dummy fuze; 120 g; MV 1,045 m/sTP-T DM 48A1: Similar to DM 48 but with tracer in rear section; 120 g; MV 1,045 m/sBreak-up shot DM 78A1: Plastic body filled with dust shot. When fired it produces sufficientresistance in the bore to actuate automatic and recoil mechanisms but after leaving the bore, centrifugalforce causes the body to disintegrate within a short distance of the gun. For training, practice in confinedareas and gun testing. 120 g; MV 1,045 m/sBlank: Intended for use in special Blank-firing barrel produced by Rheinmetall GmbH to replaceoperational barrels during training. The case carries a reduced weight of propellant (15 g) sufficient torupture the crimped nose of the metal body which remains attached to the case when the requiredmechanism operating temperature has been reached. Round weight is approx 230 gGREECE<h2>Manufacturer</h2>PYRKAL: Greek Powder & Cartridge CompanyType: HE-I-T NM75MP: Steel shell with sintered iron driving band, loaded RX51 explosive charge,RS40/41 incendiary charge, and strikerless fuze, with rear tracer burning >4.3 seconds. Self-destructionis provided by means of a heat relay between the tracer and the explosive filling. 120 g; MV 1,045 m/sHE-I-T M599: Steel body, sintered iron driving band, 5.8 g of Hexal 70/30 and an impact fuze M594with self-destruction after 5.5 seconds. A dark ignition tracer is fitted, burning from 300 to about 2,000m, and a tracerless version is also available. 120 g; MV 1,055 m/sTP: Steel shell, empty; dummy fuze; 120 g; Mv 1,045 m/sTP-T: Steel two-section shell, front empty with rear filled red tracer; 120 g; dummy fuze; MV 1,045m/sNETHERLANDS<h2>Manufacturer</h2>NWM de Kruithoorn BV (now closed)Type: HE-I-T-SD DM 81: Steel two-section shell, front filled HE-Incendiary composition, rear filledred tracer burning for 3.4 seconds; nose impact fuze with self-destruction mechanism after 5.5 or 9seconds; 120 g; MV 1,045 m/sAP-I-T DM 43A1: Hard core in steel body, light alloy ballistic cap with incendiary filler, red tracerburning for 1.4 seconds; 111 g; MV 1,100 m/sAPDS-T DM 63: Tungsten carbide subprojectile in plastic discarding sabot, red tracer burning for1.2 seconds; 108 g; MV 1,150 m/sTP DM 48: Steel two-section shell, filled inert; light alloy dummy fuze; 120 g; Mv 1,045 m/sTP-T DM 48A1: Similar to DM 48 but with tracer in rear section burning for 3.4 seconds; 120 g; MV1,045 m/sTP-T DM 98A2: Steel two-section shell, filled inert; plastic dummy fuze; 120 g; MV 1,045 m/sTP-T DM 98A3: Similar to DM 98A2 but with red tracer in rear section burning for 3.4 secondsBreak-up shot DM 78A2: Plastic body filled with iron powder. Projectile disintegrates within less than100 m from the muzzle; gun will function as with normal rounds. For training and practice in veryrestricted areas and gun testing. 120 gNORWAY<h2>Manufacturer</h2>Nammo Raufoss Technology A/SType: Multipurpose NM75 (MP-T-SD): Steel shell with high-explosive and incendiary fillings, theincendiary extending into the nose cap. A red tracer is in the rear, with a heat relay givingself-destruction after 3.7 to 5 seconds of flight. The projectile will function against 1.5 mm dural at1,000 m range, producing a minimum of 10 fragments, and will penetrate 12.7 mm steel plate to 200 mrange and an impact angle of 60º NATO. Red tracer 200 to 2,200 m; projectile weight 122 g; MV 1,045m/sSOUTH AFRICA<h2>Manufacturer</h2>Denel (Pty) Ltd ( PMP )Type: APT: Solid core armour-piercing tracer with ballistic cap; soft iron driving band; steel cartridgecase; 110 g; MV 1,100 m/s; penetration 40 mm at 30º at 100 mHE-I: Filled Hexal P30; soft iron driving band; KZA348 nose impact fuze; steel cartridge case; 120 g;MV 1,050 m/sHE-I-T: As HE-I but with base tracerTP: Inert loading; 120 g; MV 1,050 m/sTP-T: As for TP but with base tracerSPAIN<h2>Manufacturer</h2>EXPAL SAType: Multipurpose NM75: The shell carries a strikerless compression-ignition fuze in the nose,above a 5.5 g incendiary filling and a 2.8 g explosive filling. On impact the fuze is crushed, igniting theincendiary filling which then ignites the explosive. The explosion gives a forward impulse to theburning incendiary fragments. The rear of the projectile carries a red tracer, which by heat transferactuates self-destruction between 3.8 to 5.3 seconds. Steel cartridge case DM1001A1 with DM64percussion primer. MV 1,045 m/sTP-T: Steel two-section shell, front empty with rear filled red tracer; dummy fuze; 120 g; MV 1,050m/s<h2>Manufacturer</h2>SANTA BARBARA SAType: HE-I: Thin-wall steel shell loaded with 10 g of Hexal and fitted with an impact nose fuzeproviding self-destruction after 6 to 11 seconds flight; 125 g; MV 1,040 m/sSAP-HE-I: Pointed shell, light alloy ballistic cap filled 4.7 g Hexal; base fuze with self-destructionafter 6 to 11 seconds; 125 g; MV 1,040 m/sTP-T: Steel two-section shell, front empty, rear with tracer; dummy fuze; 125 g; MV 1,040 m/sSWITZERLAND<h2>Manufacturer</h2>Oerlikon Contraves Pyrotec AGType: Mine HE-I MSA: A large capacity steel shell loaded with 10 g of Hexal and fitted with animpact nose fuze providing self-destruction after 6 to 11 seconds flight; 125 g; MV 1,040 m/sMine HE-I-T MLA: Similar to Type MSA but with the shell body divided into two, the front sectionloaded 5.6 g of Hexal, the rear containing tracer composition; 125 g; MV 1,040 m/sSAPHEI PSA: A pointed shell with light alloy ballistic cap, filled 4.7 g Hexal and fitted with a basefuze providing self-destruction after 6 to 11 seconds of flight; 125 g; MV 1,040 m/sSAPHEI-T PLA: Similar to Type PSA but with the addition of a base tracer; 125 g; MV 1,040 m/sAPHC-T HLA: A light-alloy body containing a core of tungsten carbide and a base tracer; 110 g;Mv 1,100 m/sTP UGA: Uses a similar steel body to the Mine HE-I but of cheaper steel and with a smaller cavitywhich is left empty and plugged with a dummy fuze; 125 g; Mv 1,040 m/sTP-T ULA: Uses a similar two-section body to the Mine HE-I-T but with a larger tracer section;plugged with dummy fuze; 125 g; MV 1,040 m/s

The rimless, bottlenecked case may be of steel or brass and is percussion primed.

A wide variety of projectiles has been made across the years, but those listed below are the current manufacturing standards. Propelling charges are generally regulated to give a muzzle velocity of 1,040 m/s in a 95 calibre barrel. Developed by Hispano-Suiza in the late 1940s as a more powerful replacement for the wartime 20 × 110 mm round. The new weapon which accompanied it, the HS820 gun, became one of the most successful 20 mm designs ever made and was widely purchased throughout the world as an aircraft and ground weapon. As a result of this wide distribution the cartridge was adopted by other designers who developed suitable guns, notably the German Rheinmetall Rh202, the French M693 and the US M139. Compatible platforms include hispano-Suiza HS820; Oerlikon KAD, KAD-B; Rheinmetall Rh202; US M139 ; French M693/F2; Mauser Model B.

Nammo

20 × 139 mm

20 × 139 mm

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