Stechkin automatic pistol

This article is about the machine pistol. For the revolver, see OTs-38 Stechkin silent revolver.
APS

Stechkin automatic pistol
Type Machine Pistol
Place of origin Soviet Union
Service history
In service 1951–present
Used by See Users
Wars Vietnam war
Soviet war in Afghanistan
War in Donbass
Production history
Designer Igor Stechkin
Designed 1948
Manufacturer Vytatsky Polyany Machine-Building Plant "Molot"
Produced 1951–1959
Variants APB silent variant
Specifications
Weight 1.22 kg (2.69 lbs)
Length 225 mm (8.86 in)
Barrel length 140 mm (5.51 in)
Cartridge 9×18mm Makarov, 9×19mm Parabellum.[1]
Action blowback
Rate of fire 750 rounds/minute
Muzzle velocity 340 m/s (9×18mm Makarov)
Maximum firing range 200 m
Feed system 20-round detachable box magazine

The Stechkin automatic pistol or APS (Avtomaticheskiy Pistolet Stechkina, Russian: Автоматический Пистолет Стечкина) is a Soviet selective fire machine pistol. It 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 20000 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 inspirations 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 the 3rd of December, 1951.

The APS was issued to Red Army vehicle operators, artillery crew, 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 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

The APS is a straight-blowback, select-fire, magazine-fed machine pistol. The weapon is fed through 20-round double-stack double-feed detachable steel box magazines. The APS shares common 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 featured 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 platform, 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 1000 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.

APB silent variant

The APB (Avtomaticheskij Pistolet Besshumnyj, 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 2000 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. The barrel itself is also wrapped around by an integrated expansion chamber, in which gasses escape from holes in the barrel. When not in use, the detachable sound suppressor can be clipped to the stock.[3]

During the Soviet war in Afghanistan, 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 also employed by radio operators and even by some heavy gun crews.[3]

In the more recent past, other special forces units of the MVD such as the OMON and the SOBR have also been equipped with this pistol.

Users

See also

References

  1. ↑ Jane's Guns Recognition Guide 2005, page 73.
  2. ↑ Оружие ближнего боя. Geleos (Гелеос) Publishing House. 2006. p. 95. ISBN 978-5-8189-0443-6.; note there is typo of his middle initial on this page; it's given correctly on p. 135 though, matching other sources
  3. 1 2 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. ↑ "Modern Firearms". Retrieved 14 November 2014.
  5. ↑ «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.)
  6. ↑ "AUTOMATIC DRACULA". Retrieved 14 November 2014.
  7. ↑ Bishop, Chris. Guns in Combat. Chartwell Books, Inc (1998). ISBN 0-7858-0844-2.
  8. ↑ https://sites.google.com/site/worldinventory/wiw_eu_ukraine
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