Designations of Russian towed artillery
Encyclopedia
The official designations of Russian and Soviet
Soviet Union
The Soviet Union , officially the Union of Soviet Socialist Republics , was a constitutionally socialist state that existed in Eurasia between 1922 and 1991....

 artillery
Artillery
Originally applied to any group of infantry primarily armed with projectile weapons, artillery has over time become limited in meaning to refer only to those engines of war that operate by projection of munitions far beyond the range of effect of personal weapons...

 consists of three sequential parts – weapon caliber, weapon type, and finally a unique identifier for each variant. This system is descended from the later Russian Empire
Russian Empire
The Russian Empire was a state that existed from 1721 until the Russian Revolution of 1917. It was the successor to the Tsardom of Russia and the predecessor of the Soviet Union...

, but its first (caliber
Caliber
In guns including firearms, caliber or calibre is the approximate internal diameter of the barrel in relation to the diameter of the projectile used in it....

) and third (unique identifier
Unique identifier
With reference to a given set of objects, a unique identifier is any identifier which is guaranteed to be unique among all identifiers used for those objects and for a specific purpose...

) components were changed several times over the years.

Origin - Russian Empire

After abolishing the old system of designations based on projectile or gun weight during the early years of the 20th century, Imperial Russian Army
Imperial Russian Army
The Imperial Russian Army was the land armed force of the Russian Empire, active from around 1721 to the Russian Revolution of 1917. In the early 1850s, the Russian army consisted of around 938,731 regular soldiers and 245,850 irregulars . Until the time of military reform of Dmitry Milyutin in...

 designation policy was simplified. The first component of the designation was caliber in inches or lines, then type of a piece with optional producer’s name and attributes such as regimental, divisional, siege, field, fortress, etc. follows and the year of adopting the piece onto Army service finishes the name. E. g. 6-дюймовая гаубица обр. 1909 г. (6-inch howitzer M1909) or 6-дюймовая осадная пушка образца 1910 года (6-inch siege gun M1910).

Metric system (1917)

After the October Revolution
October Revolution
The October Revolution , also known as the Great October Socialist Revolution , Red October, the October Uprising or the Bolshevik Revolution, was a political revolution and a part of the Russian Revolution of 1917...

, the first change in this new system took place, when Soviet Union
Soviet Union
The Soviet Union , officially the Union of Soviet Socialist Republics , was a constitutionally socialist state that existed in Eurasia between 1922 and 1991....

 officially adopted the metric system
Metric system
The metric system is an international decimalised system of measurement. France was first to adopt a metric system, in 1799, and a metric system is now the official system of measurement, used in almost every country in the world...

 and abolished old non-metric measurement units. From this point until the present caliber is expressed in millimeters; the fractional part of the caliber was rounded to the nearest integer value. In some cases, the attributes were simplified. Examples of these modified designations include 76-мм дивизионная пушка обр. 1902 г. (76 mm divisional gun M1902, formerly 3-inch divisional gun M1902) or 152-мм пушка обр. 1910 года (152 mm gun M1910, formerly 6-inch siege gun M1910).

Modernized weapons

The industrial growth of the Soviet Union during the late 1920s and the 1930s allowed the modernization of older or obsolescent artillery. Modernized ordnance received a second model designation after a slash, for example 152-мм пушка обр. 1910/30 гг. (152 mm gun M1910/30). In case of further modernizations of the piece, the intermediate modernizations were not reflected in the name, for example the later modernization was 152-мм пушка обр. 1910/34 гг. (152 mm gun M1910/34).

Army designation versus factory designation

After 1930, newly designed or constructed towed artillery received two official designations, the first of which was the traditional Army designation, e. g. 122-мм гаубица обр. 1938 г. (122 mm howitzer M1938), but another one was the index of a factory (or a developer: ordnance plants in the Soviet Union very often had their own design bureaus). This consisted of between one to three letters and the project number. For the 122 mm howitzer M1938 mentioned above, the developer index was M-30. Letters identified the developer or producer. For example, M stands for Motovilkha plant, A - for KhPZ, B – for ‘Bolshevik’ plant, S – for Central Artillery Design Bureau, D – for Factory No. 9, ZiS – for Factory No. 92 (Zavod imeni Stalina - factory named after Stalin) and so on. There was one exception: the artillery plant named after Mikhail Kalinin
Mikhail Kalinin
Mikhail Ivanovich Kalinin , known familiarly by Soviet citizens as "Kalinych," was a Bolshevik revolutionary and the nominal head of state of Russia and later of the Soviet Union, from 1919 to 1946...

; their project number was placed first, followed by the 'K' letter; examples of these designations include 61-K or 20K (variants with and without a dash are both widely used in historical documents). For some pieces of artillery, both the Army and developer names were well known and interchangeable, such as the 76 mm divisional gun M1942 known also as ZiS-3. For some other guns, such as the 45 mm anti-tank gun M1937, the developer index (53-K) was very rarely used, even in literature of the time.

Further modifications - 1950s

This system was used throughout and well after the Second World War. In the 1950s, another change took place. The year was dropped from the official names of newly designed pieces, and instead of the M19XX (обр. 19ХХ г.), the developer index became used as the unique identifier, e. g. 122-мм гаубица Д-30 (122 mm howitzer D-30). The change was not applied to old pieces, e. g. the D-1 was still referenced as a 152 mm howitzer M1943, and not as a 152 mm howitzer D-1.

The third change was connected with introduction of the GRAU
Grau
Grau is a German word meaning "gray" and a Catalan word meaning "grade". It may refer to:* BAP Almirante Grau , a De Zeven Provinciën class cruiser in service with the Peruvian Navy* Grau Käse, Tyrolean grey cheese...

 system of indices for ordnance, weapons, and munitions. After this introduction, the developer index was dropped from the official piece name (but it still officially exists through the design and testing process); henceforth, the GRAU designation was used as the unique identifier, e. g. 152-мм пушка 2А36 (152 mm gun 2A36). This is the current system used by the Russian Federation's Agency for Missiles and Artillery (still known as GRAU
Grau
Grau is a German word meaning "gray" and a Catalan word meaning "grade". It may refer to:* BAP Almirante Grau , a De Zeven Provinciën class cruiser in service with the Peruvian Navy* Grau Käse, Tyrolean grey cheese...

) and the Russian Strategic Rocket Forces
Strategic Rocket Forces
The Strategic Missile Troops or Strategic Rocket Forces of the Russian Federation or RVSN RF , transliteration: Raketnye voyska strategicheskogo naznacheniya Rossiyskoy Federatsii, literally Missile Troops of Strategic Designation of the Russian Federation) are a military branch of the Russian...

.
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