The Oznobischev 1925 (Ознобищев 1925) is a prototype

semi-automatic pistol A semi-automatic pistol is a type of repeating single-chamber handgun ( pistol) that automatically cycles its action to insert the subsequent cartridge into the chamber (self-loading), but requires manual actuation of the trigger to actuall ...

Military Historical Museum of Artillery, Engineers and Signal Corps The Military Historical Museum of Artillery, Engineers and Signal Corps (russian: Военно-исторический музей артиллерии, инженерных войск и войск связи), also known simply as the Art ...

."Основы стрелкового оружия" (Ф.К. Бабак, 2003), и в журнале "Ружье" в январе 2005 г.

Overview

The Oznobischev 1925 pistol was designed originally for the 7.62x38mmR Nagant cartridge, but in 1926 it was modified for the

.32 ACP .32 ACP ( Automatic Colt Pistol, also known as .32 Automatic) is a centerfire pistol cartridge. It is a semi-rimmed, straight-walled cartridge developed by firearms designer John Browning, initially for use in the FN M1900 semi-automatic pi ...

ammunition Ammunition (informally ammo) is the material fired, scattered, dropped, or detonated from any weapon or weapon system. Ammunition is both expendable weapons (e.g., bombs, missiles, grenades, land mines) and the component parts of other weap ...

. The design of the pistol had many revolutionary solutions. First of all, this it was the first pistol to successfully use

gas operated reloading Gas-operation is a system of operation used to provide energy to operate locked breech, autoloading firearms. In gas-operation, a portion of high-pressure gas from the cartridge being fired is used to power a mechanism to dispose of the spent ...

. Under the

barrel A barrel or cask is a hollow cylindrical container with a bulging center, longer than it is wide. They are traditionally made of wooden staves and bound by wooden or metal hoops. The word vat is often used for large containers for liquids, ...

there is a

lever A lever is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or ''fulcrum''. A lever is a rigid body capable of rotating on a point on itself. On the basis of the locations of fulcrum, load and effort, the lever is div ...

that under gas pressure swings and unlocks releasing the bolt. The bolt itself can be opened by pressing the "trigger" of the trigger guard to eject misfired cartridges and reload the next round into the chamber. The trigger, as a separate part, is not provided, and the striker is made separately from the bolt. When fired, the bolt moves forward, pushing the cartridge out of the magazine and driving it into the chamber. The bolt is firmly engaged with the barrel at the moment of maximum gas pressure, the barrel is unlocked, when the bullet passes the gas port, and after opening the bolt. There is also a loaded chamber indicator in the chamber, blocking the line of sight when the chamber is empty. The pistol was originally intended for more powerful ammunition, which is why it included a gas piston; the .32 ACP caliber was only a transitional stage. But, for a number of reasons, Oznobishchev was never able to complete his pistol.

References

{{reflist

.32 ACP semi-automatic pistols Semi-automatic pistols of the Soviet Union Trial and research firearms of the Soviet Union

Overview

See also

References