Osa (handgun)

OSA (Russian: оса, "wasp") is a family of Russian non-lethal pistols that can be also used as flare gun, flashbang gun or starting pistol. The system consists of the gun (2-4 cartridges, laser target pointer, electronic ignition capsule), and various ammunition types.

TypeNon-lethal handgun
Place of originRussia
Production history
Mass0.4 kg
Length1.77" (45 mm)

Cartridge18×45 mm
Caliber18 mm
ActionDouble action, break action
Feed system4-round chamber

OSA was developed in the 1990s by engineer-constructor and weapon designer G.A. Bideev (Г.А. Бидеев).[2] It was designed and is manufactured by the state-owned organizations Federal Center for Research and Manufacturing and The Institute for Science and Research in the Applied Chemistry.[1] The pistol is available in the civilian market.

Design details

The PB-4 is a four-barreled break-action gun. It has two horizontal "8"-shaped chambers in its aluminum chamber block, each housing two rounds. There is no need for a separate chamber for each round, because the gas pressure is contained by the cartridges' thick cylindrical case (the external case diameter is 18mm, while the bullet caliber is 15.3mm). This design aims to prevent the gun from operating properly if the round is unlawfully modified to increase its power. The cartridge case also performs the function of the barrel, with the bullet positioned deep inside and accelerating within the case. The front end of the case is level with the front end of the chamber block when in firing position. There is a four-fingered extractor in the central channel of the chamber block; the cartridge cases are rimless and have an extractor groove. The extractor keeps cases from falling forward outside of the chamber block. When the action is opened, cases are extracted backwards for manual reloading. The trigger and trigger guard are fixed to lower side of the chamber block.

The chamber block is locked to the handle block, which contains the locking surface, firing button (pushed by the trigger when the chamber block is locked), pistol grip, battery and electronics. The cartridge primers are ignited electrically, so there are four circular contact plates on the locking surface (contacting the case bottom) and four contact pins in the center of each plate (contacting the primer). On the trigger pull an impulse is generated. The electronic firing mechanism is able to send firing impulses in sequence to the chambers from 1 to 4 and to skip chambers with malfunctioning rounds to avoid misfires. The weapon is only capable of firing one round at a time. There are different models of PB-4; in some, the firing mechanism is fed by a battery, on others by a piezoelectric igniter similar to those used by kitchen gas lighters.

There is a simple sight assembly atop the chamber block – a semi-cylindrical groove along it, and a white forward post at the front of the groove. Some variants of PB-4 have a built-in laser sight with a laser window in the center of the "locking surface", and the beam following the central extractor channel of the chamber block. The laser switch on the left side of the handle block is operated by the thumb, and the laser is fed by a battery inside the pistol grip. There are no safety switches – the locked and loaded weapon is always ready to fire (provided the battery is not discharged, for the models which use a battery).[3]

The OSA Handgun M09 has been marketed in The Americas via Defenzia, LLC in the United States and Defenzia, LTDA in Brazil. Defenzia plans on assembling and manufacturing the pistols in Brazil and subsequently in the United States beginning in 2016 under the Brand Defenzia.

OSA and Defenzia have entered into this joint agreement in 2014. In 2016 both companies plan on launching the civilian "M11" version of the weapon in the USA. This new less-lethal weapon for the civilian market will come in 50 Caliber and have the same capabilities as the law-enforcement weapon, and awaits BATF approval.[4]


A person shot from about 1 meter with an 18x45T OSA pistol to the temporal region of the head suffered a penetrative injury, with the bullet traversing most of the brain, reducing the victim to a vegetative state.[5]


  • PB-4 "OSA" (ПБ[6]-4 "ОСА") – first model, 18×45 mm cartridge, piezo priming, mechanical barrel selector, production started in 1999[1]
  • PB-4M (ПБ-4М) – second model, 18×45 mm cartridge, piezo priming, electronic barrel selector, production started in 2002
  • PB-4-1 (ПБ-4-1) – model with built-in laser sight, 18×45 mm cartridge, battery priming, user-controlled electronic barrel selector, production started in 2003[1]
  • PB-4-1ML (ПБ-4-1МЛ[7]) – new model with built-in laser sight, 18×45 mm cartridge, piezo priming, electronic barrel selector, production started in 2005[8]
  • PB-4-2 (ПБ-4-2) – model, 18.5×55 mm cartridge[9]
  • OSA M 09(ОСА М 09) – new model, 18.5×55 mm cartridge
  • PB-4SP (ПБ-4СП[10]) – "service model", 18.5×60 mm cartridge, in 2005 adopted by Ministry of the Interior of the Russian Federation as service weapon for several categories of Russian law enforcement[1] (Moscow Metropolitan post and patrol Militia unit,[11] etc.),[12] later it was adopted as service weapon for military police units[13]


A set of «OSA» consists of several types of cartridges, intended for self-defense (and traumatic light-and-sound) and illumination.

  • 18×45T (18×45T) – traumatic cartridge equipped 15.3 mm rubber bullet in aluminum case. The traumatic cartridge contains an 11.6 g bullet, made of rubber and having a metal reinforcing core.[21] This bullet has an initial speed of about 120 m / s and a muzzle energy of about 85 J. The bullet causes a shock when it hits the target.
  • 18×45 O (18×45 O) – white flash (105 candela)
  • 18×45 S (18×45 С) – a signal cartridge in aluminum case with coloured (yellow, red or green) flare
  • 18×45 SZ (18×45 СЗ) – light-and-sound cartridge in aluminum case contains a special charge, providing an extremely loud and bright shot, produced since 2004
  • 18×45 I (18×45 И) – tear gas cartridge (capsaicin + CN), produced since 2005[22]
  • 18×45 Pr. (18×45 Пр.) – inert version of cartridge in aluminum case used for education and practice during training
  • 18×45 SM (18×45 СМ, "патрон фейерверочный") – aerial firework cartridge in aluminum case
  • 18×45 RSh (18×45 РШ) – traumatic cartridge equipped 12 g rubber bullet, produced since 2010. The traumatic cartridge contains a 22 mm bullet, made of rubber without a metal reinforcing core in aluminum case and has a muzzle energy of about 100 J[23]
  • 18×45 «A+A» – traumatic cartridge equipped 15.3 mm rubber bullet in plastic case. The traumatic cartridge contains a bullet, made of rubber and having a metal reinforcing core.[24] This bullet has a muzzle energy of about 91 J.[25]
  • 18×45 RG (18×45 РГ) – traumatic cartridge equipped rubber bullet in composite case. The traumatic cartridge contains an 11.6 g bullet, made of rubber and having a metal reinforcing core[26]
  • 18.5×55T (18.5×55T) – traumatic cartridge equipped 15.7 mm rubber bullet in aluminum case. The traumatic cartridge contains a 13.2 g bullet[27]

The pistol launcher itself generates an electric pulse to ignite the gunpowder charge.


  1. Дмитрий Кочетков. 10 лет спустя: огнестрельное бесствольное оружие самообороны отмечает первый юбилей // «Калашников. Оружие, боеприпасы, снаряжение», № 12, 2006. стр.28-30
  2. Г. Бидеев. Комплекс ОСА - оружие самообороны XXI века // "Ружьё", № 1, 2000.
  3. "Securityarms.com". Archived from the original on 16 July 2011. Retrieved 17 February 2011.
  4. For more information visit www.defenzia.com
  5. Применяя - думать! Оценка применения нелетального травматического оружия военно-полевыми хирургами Archived 29 October 2013 at the Wayback Machine // журнал "Калашников. Оружие, боеприпасы, снаряжение", № 5, 2010. стр.58-61
  6. П=пистолет (pistol), Б=бесствольный (barrelless)
  7. М=модель (model), Л=лазерный целеуказатель (laser pointer)
  8. Д.Л. Кочетков. ПБ-4-1МЛ: первый взгляд // «Калибр», № 12, 2005
  9. Михаил Дегтярев. "Оса" против "Осы" // журнал "Калашников. Оружие, боеприпасы, снаряжение", № 4, 2010. стр.40-41
  10. С=сотрудник (officer), П=правоохранительный орган (law enforcement agency)
  11. Светлана Самоделова. Нелетальный патруль. Стражей правопорядка вооружат “свирелями”, “рулетами” и “зверобоями” // «Московский комсомолец», 15 января 2008
  12. Полицию вооружают «Осой». Вместо ПМ участковым, сотрудникам ППС и транспортной полиции будут выдавать травматические пистолеты Archived 15 November 2013 at the Wayback Machine // "Известия" 27 марта 2012
  13. Алексей Михайлов. Военных полицейских вооружат травматическими пистолетами Archived 2 November 2013 at the Wayback Machine // „Известия“ от 25 июня 2013
  14. "Кроме России комплекс «Оса» стоит на вооружении правоохранительных органов Белоруссии, Армении, Израиля, ОАЭ, Саудовской Аравии и Чехии"
    Военная полиция РФ осваивает комплекс нелетального действия «ОСА» Archived 1 November 2015 at the Wayback Machine // "Военно-промышленный курьер" от 30 октября 2015
  15. Светлана Тумакова. Самооборона… по разрешению Archived 5 October 2013 at the Wayback Machine // общественно-политическая газета "Око" от 12 января 2007
  16. ПРЕСС-РЕЛИЗ о состоянии преступности с применением огнестрельного оружия с патронами травматического действия Archived 10 June 2015 at the Wayback Machine // The Ministry of the Interior of the Republic of Kazakhstan press-release
  17. "Перечень видов вооружения охранников... Сертифицированное в установленном порядке в качестве гражданского оружия... огнестрельное бесствольное оружие отечественного производства"
    Постановление Правительства РФ № 179 от 4 апреля 2005
  18. "В Петербурге совершено нападение на охрану стройплощадки Мариинского театра... во время инцидента один из охранников применил оружие – травматический пистолет ПБ-4. Однако нападавшие отобрали оружие и скрылись с места преступления."
    В Петербурге совершено нападение на охрану стройплощадки Мариинского театра Archived 4 October 2013 at the Wayback Machine // "Агентство Бизнес новостей", 31 October 2008
  19. "3.1.3. Огнестрельное бесствольное оружие отечественного производства с патронами травматического, газового и светозвукового действия, соответствующими нормам Министерства здравоохранения и социального развития Российской Федерации, в том числе ПБ-4 "Оса""
    Приказ Министерства внутренних дел РФ № 611 от 4 августа 2006 года "Об утверждении перечней специальных средств, видов, типов и моделей огнестрельного и газового оружия, патронов и боеприпасов к нему, норм обеспечения ими работников военизированных и сторожевых подразделений ФГУП "Охрана" МВД России"
  20. "Archived copy". Archived from the original on 1 December 2016. Retrieved 1 December 2016.CS1 maint: archived copy as title (link)
  21. А. Жеромский. "ОСА": испытания // "Ружьё", № 6, 1999. стр.46
  22. Новинки травматического оружия // журнал "Калибр", № 10, октябрь 2005. стр.6-7
  23. Михаил Дегтярёв. 100 джоулей для «Осы». // «Калашников. Оружие, боеприпасы, снаряжение», № 12, 2010. стр.70-71
  24. Патрон травматического действия калибра 18х45 к огнестрельному оружию ограниченного поражения, огнестрельному бесствольному оружию ТУ 7272-003-5254-051 // сертификат соответствия № РОСС.RU.SA.01B04271
  25. Электропатрон калибра 18x45 для бесствольного огнестрельного оружия самообороны Archived 3 May 2013 at the Wayback Machine // ООО "А+А" official site
  26. Бюджетный электропатрон калибра 18х45 Archived 8 November 2013 at the Wayback Machine // ООО "А+А" official site
  27. В.Д. Исаков, В.Ю. Назаров, В.М. Караваев, Л.Е. Богданова, Т.В. Лебедева. Ранение из огнестрельного травматического комплекса ПБ-4-2 «Оса» // журнал «Судебно-медицинская экспертиза», № 6, 2012. стр.54-56

See also

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