Heckler & Koch P7 тапаншасы: Құрылысы мен ерекшеліктері

The Heckler & Koch P7 is a German 9×19mm semi automatic pistol designed by Helmut Weldle and produced from 1979 to 2008 by Heckler & Koch GmbH (H&K). The P7M13, a variant of the P7 with a double stack magazine, was produced until 2000.

Prompted by the 1972 Munich Olympics Massacre, the German police forces decided to replace the .32 ACP Walther PP with a similarly sized but more effective 9×19mm Parabellum pistol. The pistol was also exported to several countries. The P7 was submitted to the U. S. Army Joint Service Small Arms Program as a replacement for the M1911 pistol, but the Beretta 92SB F won and was adopted by the Army as the Beretta M9 pistol.

The P7 is a semi automatic blowback operated firearm. It features a unique gas delayed blowback system modeled on the Swiss Pistole 47 W+F (Waffenfabrik Bern) prototype pistol (and ultimately on the Barnitzke system first used in the Volkssturmgewehr 1 5), which used gas pressures from the ignited cartridge and fed them through a small port in the barrel (in front of the chamber) to retard the rearward motion of the slide. This is accomplished by means of a piston contained inside a cylinder located under the barrel that opposes the rearward motion of the slide until the gas pressure has declined—after the bullet has left the barrel—hence allowing the slide to end its rearward motion, opening the breech and ejecting the empty cartridge case. The chamber has 18 flutes that aid in the extraction process by allowing combustion gases to flow between the fired case and the chamber walls, preventing the case from "sticking" to the chamber walls. The drawback of this system is that the breech "opens" slightly prematurely to allow the slide to initiate its rearward motion. The high temperature gases cycling through a tube located below the chamber area and above the trigger made the early versions of this pistol uncomfortable, according to some, to shoot after the content of two magazines were fired due to heating. The advantages of this system are a simpler manufacturing process due to the absence of a locking system and a high mechanical accuracy due to the barrel being fixed in the frame; the barrel does not execute any sort of lateral or vertical movement during the operating cycle as with the Browning cam action systems common to many other locked breech pistols.

The P7's spring extractor is contained within the slide, while the fixed ejector is a surface on the slide catch. The grip of this pistol features a built in cocking lever located at the front of the grip. Before the pistol can be fired, this lever must be squeezed; thus this lever acts as a safety. The pistol is striker fired. Squeezing the cocking lever with a force of cocks the firing pin. Once fully depressed, only of force are required to keep the weapon cocked. The weapon is then fired by pressing the single stage trigger rated at approximately As long as the lever is depressed, the weapon fires like any other semi automatic pistol. If the lever is released, the weapon is immediately de cocked and rendered safe. This method of operation dispensed the need for a manual safety selector while providing safety for the user carrying the pistol with a chambered round, and increased the speed with which the pistol could be deployed and fired. The trigger and firing mechanism's method of operation (and the unique slide catch) were protected by , issued on January 2, 1979. The P7 is fed from a single stack box magazine with a capacity of 8 rounds, which is held inside the firearm's frame with a release located at the heel of the grip. After the last round has been fired, the slide will remain open thanks to a slide catch that can be released by pulling the slide further back or pressing the squeeze cocker. The firearm uses a fixed, polygonal rifled barrel (hexagonal with a 250 mm twist rate) and a fixed notched iron sight with contrast dots that enable shooting in low level lighting conditions. The pistol is completely ambidextrous and two handed use is enhanced through the use of a profiled and enlarged trigger guard. The trigger guard was equipped with a synthetic heat shield that protects the shooter from excessive heating and a lanyard attachment loop was added in place of the previous magazine heel release. The firing pin and its bushing were also changed.

Based on the P7 several other variants were built: the P7PT8, P7M13, P7K3, P7M10 and the P7M7, none of which remain in production. Production of the "P7" heel release design ended in 1997 with the KH date coded pistol marked "P7" on the Grip and "PSP" on the slide. The P7PT8 is a dedicated, straight blowback training pistol modified for use with the 9×19mm PT training cartridge (made by Geco) with a plastic bullet (weighing 0.42 g). A "floating chamber" adapter is used inside the barrel which enhances felt recoil for use with the special ammunition. The pistols were marked with blue dots on both sides of the slide to differentiate the P7PT8 from other P7 pistols that can chamber lethal ammunition. This pistol was entered to the US Army XM9 pistol trials as a replacement for the aging M1911 pistol, A variant known as the P7M13SD was produced in limited numbers exclusively for German special forces, featuring a longer (compared to the P7M13) threaded barrel and a sound suppressor. The P7K3 is a shortened version of the P7 (inspired by the HK4 pistol) that uses straight blowback for operation. This version has a removable barrel and uses a sealed hydraulic recoil buffer in place of a gas cylinder. After swapping out the barrel and magazine it can use .380 ACP (9×17mm Short) or .32 ACP (7.65×17mm Browning SR) pistol cartridges and after replacing the slide, magazine and barrel (with floating chamber insert)—it can also be used to fire .22 LR (5.6mm Long Rifle) ammunition. With the American market in mind, a variant known as the P7M7 designed to use the .45 ACP (11.43×23mm Automatic Colt Pistol) cartridge was also created. However, it remained only a prototype due to excessive costs and complexity of creating such a weapon. However, the P7 is also subject of criticism as well. According to 1996 report by the German Weapons Journal (Deutsches Waffen Journal / DWJ), the P7 had caused various deaths in Lower Saxony in the 1990s due to incorrect operation/human error. The P7 is designed so that it can be fired when the trigger and safety/cocking handle are being held at the same time. A design oversight means operator can pull the trigger first and then the cocking handle, as the pistol does not differentiate which is pressed first. Because of this, several accidents occurred in stressful situations, when police officers would reflexively pull the trigger and then the safety/cocking handle, resulting in unintended injury and/or deaths of colleagues as well as suspects. At same time, DWJ published an article on how the P7 could be changed so that the trigger becomes inoperative if it is pulled when the grip is relaxed and after pulling the grip only after relieving the load, such as after a shot, is re armed. It is unknown whether or how many weapons were converted accordingly. Due to the firing system, the gun gets very hot in the area of the front grip, where the gas cylinder is located. This was particularly troublesome with the original version of P7, the PSP. Subsequent models, such as P7M8, rectified this by installing a plastic heat shield above the trigger guard. HK operating instructions indicate it is possible to reduce the sound of the firing pin/spring relaxing, by pulling the slide back a little while relaxing; however, the movement of the handle is still clearly audible when tensioning and relaxing, which is perceived as a disadvantage in certain tactical situations.

: P7M13 variant. : Was used by the military police (Feldjäger), Federal Police (Bundespolizei) and several other police departments. : P7M8 variant. : Used by the Viking Squad. : P7M13 variant. and the United States Park Police
: P7M8 variant.