Engineering:Stechkin automatic pistol

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Short description: Type of Soviet machine pistol
Stechkin
Stechkin APS.jpg
Stechkin machine pistol with a removeable stock attached
TypeMachine pistol
Place of originSoviet Union
Service history
In service1951–present
Used bySee Users
WarsVietnam War
Shaba II[1]
Soviet–Afghan War
Afghan Civil War (1989-1992)
Tuareg rebellion (1990–1995)
Chechen-Russian conflict
War in Afghanistan
South Ossetia War
Russo-Ukrainian War
Syrian Civil War
Production history
DesignerIgor Stechkin
Designed1948
ManufacturerVytatsky Polyany Machine-Building Plant
Produced1951–1958 (APS)
1972–1973 (APB)
VariantsAPB silent variant
Specifications
Mass1.22 kg (2.69 lbs)
Length225 mm (8.86 in)
Barrel length140 mm (5.51 in)
Cartridge9×18mm Makarov, 9×19mm Parabellum (Romanian Pistol Md. 1998 variant)
ActionBlowback
Rate of fire750 rounds/minute
Muzzle velocity340 m/s (9×18mm Makarov)
Effective firing range50 m (9×18mm Makarov)
Maximum firing range200 m
Feed system20-round detachable box magazine

The Stechkin or APS (Avtomaticheskiy Pistolet Stechkina = Автоматический Пистолет Стечкина) is a Soviet selective fire machine pistol chambered in 9×18mm Makarov and 9×19mm Parabellum introduced into service in 1951 for use with artillery and mortar crews, tank crews and aircraft personnel, where a cumbersome assault rifle was deemed unnecessary. Seeing service in a number of wars such as the Vietnam War, Russo-Ukrainian War and Syrian Civil War. The APS was praised for its innovative concept and good controllability for its size. However, the high cost of the weapon, complex and time-consuming machining, combined with a limited effective range, large size and weight for a pistol, and fragile buttstock have been mentioned as a reason to phase it out of active service in favour of assault rifles such as the AKS-74U. The pistol bears the name of its developer, Igor Stechkin.

Adoption and service

Submachine guns such as the PPSh-41 or the PPS-43 were declared obsolete shortly after the adoption of the AK47 assault rifle. A new self-defence weapon was requested for artillery and mortar crews, tank crews and aircraft personnel, where a cumbersome assault rifle was deemed unnecessary.

Igor Yakovlevich Stechkin, recently graduated in 1948 from the Tula Mechanical Institute, began work on this new automatic weapon concept, competing against other prolific designers such as Vojvodin and Kalashnikov. Stechkin designed a select-fire pistol capable of accurate fire up to 200 meters, with the possibility of attaching a combination holster/shoulder stock. Field-testing of the first prototypes was undertaken from April to June 1949. A 20,000 round endurance test against an Astra machine pistol and a PPS-43 submachine gun proved that Stechkin's design was promising. However, the testing board showed flaws of the prototype, such as the lack of adjustability of the rear sight, the high weight (1.9 kg with holster), short sight radius, and the recoil spring located under the barrel.

A large redesign effort was made by Stechkin. He took several innovations from the Makarov pistol, such as the general silhouette, slide rails, extractor. The gun was lightened, the trigger mechanism redesigned and simplified, and the trigger guard reshaped. After successful military tests, the APS was formally adopted on December 3, 1951.

The APS was issued to Soviet Army vehicle operators, artillery crews, and front-line officers and law enforcement, and was used in conflicts in Angola, Libya, Mozambique, Romania, Tanzania and Zambia. The APS was praised for its innovative concept and good controllability for its size. However, the high cost of the weapon, complex and time-consuming machining, combined with a limited effective range, large size and weight for a pistol, fragile buttstock, frequent stoppages and subpar ergonomics, led to the APS being gradually phased out of active service. However, the weapon found a new niche among special forces such as the Spetsnaz or FSB, who needed a more effective sidearm than the Makarov PM. The Stechkin APS was eventually replaced[citation needed] by the AKS-74U compact assault rifle in 1981, offering more firepower due to its much more powerful 5.45×39mm M74 rifle ammunition, acceptable accuracy at moderate distances, and greater magazine capacity.

A contemporary derivative of the Stechkin, the OTS-33 Pernach, is also chambered for the 9×18mm Makarov cartridge.

Design details

Left side of APS. Note the fire selector set on safe.
Right side of APS.

The APS is a straight-blowback, select-fire, magazine-fed machine pistol. The weapon is fed through 20-round double-stack staggered-feed detachable steel box magazines. The APS shares features with the Makarov service pistol, such as a heel-mounted magazine release, slide-mounted safety lever, and field-strip procedure. The rear sight is adjustable from 25, 50, 100 to 200 meters through an eccentric rotating drum-dial. The serrated front sight may be drifted for windage. The slide features a textured strip on top to reduce aim-disturbing glare. The chrome-lined barrel serves as the recoil spring guide. The slide stop lever also acts as an ejector blade. The trigger guard pivots down for stripping and detents in position through a spring-loaded plunger. The checkered or serrated grips' panels are made from wood (early models), reddish-brown bakelite or black plastic.

The Stechkin features a combination safety-decocker-fire selector lever on the slide. The three-position lever, when pointed forward in the "PR" or safe position, decocks and locks the hammer, locks the slide to the frame and prevents forward travel of the free-floating firing pin. When pointed downwards to the "OD", or single-shot position, the safety lever deactivates the auto-sear and rate reducer to allow semi-automatic fire. Finally, the rearmost "AVT" position puts the APS in fully automatic mode.

The trigger mechanism of the APS is of a simple construction and features a double/single-action fire mode. It comprises a trigger and trigger bar, disconnector, sear and hammer. The rebounding hammer, when in resting state, has an intermediate safety intercept notch that does not allow forward travel of the hammer unless the sear is raised. Disconnection is achieved through a cam in the slide.

To make controllable automatic fire possible through such a system, designer Stechkin employs several mechanical solutions. Firstly, the slide has a very long stroke (three times the length of the cartridge). This allows time to slow the slide down and reduce felt recoil by minimising the jolt produced through the collision of the slide with the frame. Secondly, the rate-reducer lever offers extra resistance to the opening stroke of the slide, further slowing down the cycling process. Finally, the primary inertial rate reducing plunger delays the dropping of the hammer after the slide closes. The slide has a large cam that strikes a lever downwards. This lever transfers that energy to a spring-loaded weight located in the grip. The weight travels down, compressing its spring, then slams back up into the trigger bar, tripping the sear and firing the gun. Effectively, the rate reducer, which reduced the automatic rate of fire from 1,000 RPM to 750RPM, also acts as the auto-sear.

The machine pistol may be fitted with a wooden (early), brown bakelite or steel wire shoulder stock (for the APB variant); otherwise, the weapon becomes difficult to control on full auto. The stock is attached via a T-slot cut into the rear strap of the pistol frame. The stock is hollowed out and can act as a holster, accepting the machine pistol inside, similar to the Mauser C96 pistol. A Leather sling and ammunition pouch were also supplied with the weapon.

APB

The Russian Stechkin APS and suppressed APB select-fire machine pistols introduced into Russian service in 1951.

The APB (Avtomaticheskiy Pistolet Besshumniy, meaning automatic silenced pistol) version was a version of the APS optimized for silent operations. Developed in the early 1970s by A.S. Neugodov (А.С. Неугодов) under the factory name AO-44, it was officially adopted in 1972 under the service name APB and given GRAU index 6P13. Approximately 2,000 APS pistols were converted to APB variants by the Vyatskie Polyansky Machine-Building Plant from 1972 to 1973. Muzzle velocity reportedly dropped to 290 m/s in this variant.[2] Instead of the holster-stock of the APS, the APB comes with a detachable stock made of steel wire. Its barrel is longer than that of the APS; it protrudes from the slide and is threaded for the attachment of an eccentric sound suppressor. When not in use, the detachable sound suppressor can be clipped to the stock.[3]

During the Soviet–Afghan War, the APB was used by Soviet Spetsnaz team leaders as an extra weapon; they usually carried on a sling with the suppressor and stock mounted. It was used by radio operators and even by some heavy gun crews.[3] Special forces units of the Ministry of Internal Affairs (MVD) such as the OMON and the SOBR have also used the pistol.[citation needed]

Users

  •  Afghanistan: Captured pistols were used by the mujahideen[4]
  •  Angola[5]
  •  Belarus: In service with OMON,[6] SOBR,[7] special forces and customs authorities.[8]
  •  Bulgaria:A number of APS pistols were supplied from the USSR to the People's Republic of Bulgaria, they remained in service after 1990.[9]
  •  Cuba[10]
  •  Georgia[11]
  •  Germany:After the reunification of Germany, a number of APS pistols were purchased by the German company "Transarms" for the German police.[12]
  •  Kazakhstan: State Courier Service[13]
  •  Libya[14]
  •  Mali: People's Movement for the Liberation of Azawad[15]
  •  Mozambique[16]
  •  Romania: Manufactured variant known as Dracula md. 98[17]
  •  Russia: Used by various police forces[18] and security guards of the Central Bank of The Russian Federation[19]
  •  Ukraine[20]
  •  Soviet Union[21]
  •  Tanzania[22]
  •  Zambia[23]

See also

Bibliography

References

  1. ↑ Sicard, Jacques (November 1982). "Les armes de Kolwezi" (in fr). La Gazette des armes (111): 25–30. http://fr.1001mags.com/parution/gazette-des-armes/numero-111-novembre-1982/page-28-29-texte-integral. Retrieved 18 October 2018. 
  2. ↑ Оружие ближнего боя. Geleos (Гелеос) Publishing House. 2006. p. 95. ISBN 978-5-8189-0443-6. https://books.google.com/books?id=dbvnhZUAWrYC&pg=PA95. ; note there is typo of his middle initial on this page; it's given correctly on p. 135 though, matching other sources
  3. ↑ 3.0 3.1 Оружие ближнего боя России / Russian Close Combat Weapon (2010), pp. 88-89, ISBN:978-5-904540-04-3; Moscow: Association "Defense Enterprises Assistance League"; almanac publication sponsored by Rosoboronexport
  4. ↑ Thompson, Leroy (27 October 2022) (in en). Soviet Pistols: Tokarev, Makarov, Stechkin and others. Bloomsbury Publishing. p. 69. ISBN 978-1-4728-5349-3. https://books.google.com/books?id=24l3EAAAQBAJ. Retrieved 8 July 2023. 
  5. ↑ Hogg 1988, p. 766.
  6. ↑ ""Морская пехота" городских улиц" (in ru-RU). 2003-11-21. https://www.sb.by/articles/morskaya-pekhota-gorodskikh-ulits.html. 
  7. ↑ "СОБР: территория напряжения" (in ru-RU). 2013-03-18. https://www.sb.by/articles/sobr-territoriya-napryazheniya.html. 
  8. ↑ Resolution of the Council of Ministers of the Republic of Belarus No. 202 of February 19, 2003 “On approval of the list of special means, types of firearms, ammunition and explosives used in the customs authorities of the Republic of Belarus”
  9. ↑ Resolution of the Council of Ministers of the Republic of Belarus No. 202 of February 19, 2003 “On approval of the list of special means, types of firearms, ammunition and explosives used in the customs authorities of the Republic of Belarus”
  10. ↑ Defense Intelligence Agency (April 1979). Handbook on the Cuban Armed Forces. Homeland Security Digital Library. p. A-17. https://www.hsdl.org/?view&did=446478. Retrieved 13 January 2024. 
  11. ↑ "Armament of the Georgian Army". Geo-army.ge. http://geo-army.ge/index.php?option=com_content&view=article&id=9&Itemid=9&lang=en. 
  12. ↑ Yuri Shtar. "Stechkin" for the German police // Weapons. - 2000. - No. 9 . - S. 12-15 .
  13. ↑ Small Arms Survey (2012). "Blue Skies and Dark Clouds: Kazakhstan and Small Arms". Small Arms Survey 2012: Moving Targets. Cambridge University Press. p. 131. ISBN 978-0-521-19714-4. http://www.smallarmssurvey.org/fileadmin/docs/A-Yearbook/2012/eng/Small-Arms-Survey-2012-Chapter-04-EN.pdf. Retrieved 30 August 2018. 
  14. ↑ "World Infantry Weapons: Libya". https://sites.google.com/site/worldinventory/wiw_africa/wiw_af_libya. 
  15. ↑ Small Arms Survey (2005). "Sourcing the Tools of War: Small Arms Supplies to Conflict Zones". Small Arms Survey 2005: Weapons at War. Oxford University Press. p. 166. ISBN 978-0-19-928085-8. http://www.smallarmssurvey.org/fileadmin/docs/A-Yearbook/2005/en/Small-Arms-Survey-2005-Chapter-06-EN.pdf. Retrieved 29 August 2018. 
  16. ↑ Hogg 1988, p. 771.
  17. ↑ "AUTOMATIC DRACULA". http://www.bumbesti-jiu.ro/umsadu/p4a.html. 
  18. ↑ "Modern Firearms". http://world.guns.ru/handguns/hg22-e.htm. 
  19. ↑ «Организации и их территориальные подразделения могут использовать до вывода из эксплуатации по техническому состоянию… 9 мм пистолет АПС… иное боевое оружие, ранее приобретенное в установленном порядке и не включенное в настоящий перечень.»
    Постановление Правительства Российской Федерации № 460 от 22 апреля 1997 г. «О мерах по обеспечению юридических лиц с особыми уставными задачами боевым ручным стрелковым оружием» (в ред. от 29 мая 2006 г.)
  20. ↑ "Wiw_eu_ukraine - worldinventory". https://sites.google.com/site/worldinventory/wiw_eu_ukraine. 
  21. ↑ Bishop, Chris. Guns in Combat. Chartwell Books, Inc (1998). ISBN:0-7858-0844-2.
  22. ↑ Hogg 1988, p. 773.
  23. ↑ Hogg 1988, p. 775.

External links



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