Name: 122 mm FRAG-HE OF-471N
Availability: InStock

Item Type

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Type

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Caliber

Weights complete round

Weights projectile

Weights explosive

Weights propellant

Weights cartridge case

Lengths complete round

Lengths projectile fuzed

Lengths cartridge case

Max muzzle velocity

Chamber pressure

Eastern Europe

Romania

Southern Europe

Spain

<h2>Armament</h2><p>122 mm Corps Gun M1931/37 (A-19); 122 mm BS-3 Field Gun; 122 mm KS-19 anti-aircraft gun; 122 mm Field Gun 390/1 and 390/2 (Spain); 122 mm M77 anti-tank gun ( Romania ).</p><h2>Development</h2><p>As its designation implies, the 122 mm Corps Gun M1931/37 (A-19) dates back to 1931, the year it entered service with the Soviet armed forces; the ordnance was placed on a different carriage in 1937 to convert it to the M1931/37. This heavy weapon has now passed from service with nearly all the former Warsaw Pact nations (other than Romania ) but it remains in service with other nations throughout the world. 122 mm self-propelled equipments carrying variants of the A-19 gun (such as the SU-122) are no longer in service anywhere. The 122 mm Field Gun 390/1 and 390/2 were originally Soviet weapons captured by the Germans during the Second World War. Numbers were passed to Spain for political purposes before 1945 and they remain in service with their carriages and ammunition updated. (The designations refer to the original German identification numbers; 12.2 cm Kanone 390/1(r) in the case of the M1931 and 12.2 cm Kanone 390/2(r) for the M1931/37). Ammunition for these guns continues to be produced in Spain, with a new long-range projectile, the 122 mm HE M86 with a Base Bleed (BB) unit, developed as late as 1986. The OF-471N is the latest of a line of 122 mm FRAG-HE projectiles used with the A-19 gun and is now virtually the only round used with this gun (although the Yugoslavs have developed a HESH-T - see separate entry). It was possible to fire the 122 mm FRAG-HE OF-462 from the A-19 gun but this capability was apparently only rarely used. Other rounds used by the 122 mm A-19 have included the 122 mm AP-T BR-471 and BR-471B, Smoke and Illuminating, but these are now rarely encountered, other than in old stockpiles.</p><h2>Description</h2><p>The 122 mm FRAG-HE OF-471N is a separate loading munition, with the projectile loaded before the cartridge case so that the bagged charge system can be varied to suit any particular fire mission. The projectile is forged steel, with a bourrelet and a band located just before the copper drive band. There is a distinct boat tail. The explosive filling is 3.36 kg of TNT but a thin-walled version with the same designation uses 4.48 kg of TNT/Amatol. Ignition of the explosive is via a point detonating fuze of the RGM-2, RGM-6 or V-429 type; it is also possible to employ the D-1 mechanical time fuze. The cartridge case used with the OF-471N is extruded 70:30 brass. The case is 785 mm long and weighs 8.45 kg. The original propellant system employed four bag charges but this was later revised to a seven-charge system (six bag charges plus a tube-shaped increment) involving DG 3 17/1 or NDT 3 17/1 charges. The seven-charge system produces muzzle velocities from 570 to 800 m/s, with the maximum range being 20,200 m.</p><h2>Authorised fuzes</h2><p>PD RGM-2. RGM-6, V-429 MTSQ D-1 Equivalent rounds ROMANIA</p><p>ROMANIA</p><h2>Manufacturer</h2><p>SN ROMARM SA</p><p>Type: HE OF-471N</p><p>Description: Standard specifications. Maximum range given as 20,000 m</p><p>SPAIN</p><h2>Manufacturer</h2><p>EXPAL SA</p><p>Type: 122 mm × 46 HE</p><p>Description: Contains either 3.5 kg of TNT or 3.7 kg of Composition B, together with a TNT or</p><p>Composition B supplementary charge in an aluminium container which can be removed from the fuze</p><p>cavity when deep intrusion fuzes are used. Weight is 33.4 kg. Muzzle velocity is 830 m/s and maximum</p><p>range 19,900 m</p><h2>Manufacturer</h2><p>EXPAL SA</p><p>Type: 122 mm HE M86 Description: This is a streamlined projectile fitted with a base bleed unit providing a maximum range of 25,000 m. The projectile is 660 mm long and weighs 23.5 kg. This projectile may be fired from other 122 mm pieces having a muzzle velocity of approximately  800 m/s</p><p>YUGOSLAVIA , FEDERAL REPUBLIC</p><h2>Manufacturer</h2><p>Yugoimport SDPR</p><p>Type: HE M59 Description: Standard specifications. May no longer be in production</p>

The 122 mm FRAG-HE OF-471N is an armament 122 mm Corps Gun M1931/37 (A-19); 122 mm BS-3 Field Gun; 122 mm KS-19 anti-aircraft gun; 122 mm Field Gun 390/1 and 390/2 (Spain); 122 mm M77 anti-tank gun ( Romania ). Development As its designation implies, the 122 mm Corps Gun M1931/37 (A-19) dates back to 1931, the year it entered service with the Soviet armed forces; the ordnance was placed on a different carriage in 1937 to convert it to the M1931/37.

This heavy weapon has now passed from service with nearly all the former Warsaw Pact nations (other than Romania ) but it remains in service with other nations throughout the world. Technical references retained in this configuration include SU-122, HESH-T, OF-462, AP-T, BR-471, BR-471B, RGM-2, RGM-6, V-429, D-1, 17/1, -19 g, 12.2 cm, 3.36 kg, 4.48 kg, 785 mm, 8.45 kg, 3.5 kg, 3.7 kg, 33.4 kg, 660 mm, 23.5 kg.

122 mm FRAG-HE OF-471N

122 mm FRAG-HE OF-471N

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