Aug 22, 2010 - If you have any information to contribute for any HK P7 models, please post it in. P7 PSP Serial Number - Date Code - Year of Manufacture. HK pistols use a two letter date code to identify the year of manufacture. K – 9 (J is only used in.

Contents • • • • • • • • • • History [ ] Prompted by the, the Germans decided to replace the with a similarly sized but more effective pistol. The new firearm was to meet the following requirements: chamber the cartridge, weigh no more than 1,000 g (35 oz), the pistol's dimensions would not exceed 180 × 130 × 34 mm, it should have a muzzle energy of no less than 500 and a service life of at least 10,000-rounds. The pistol was also to be fully ambidextrous, safe to carry with a loaded chamber (both holstered and concealed in a pocket), and able to be quickly drawn and instantly ready to fire. As a result of a competitive bid the German police forces selected three different pistols into service: the Swiss (designated the P6) and two German designs—the P7 (officially designated the PSP) and the. Series production of the P7 started in 1979. Shortly after, the pistol was adopted by the counter-terrorism unit () and the formations.

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The P7 was produced primarily by H&K but also under license by the Greek defense firm [ ] as well as in Mexico by the Departamento de Industria Militar (DIM), as a sidearm for general officers and staff. The pistol was also exported to several countries. Design details [ ] Operating mechanism [ ]. A schematic of the P7's system. The P7 is a firearm. It features a unique gas-delayed blowback locking system modeled on the Swiss Pistole 47 W+F (Waffenfabrik Bern) prototype pistol (and ultimately on the Barnitzke system first used in the ), 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.

Installing SIP TAPI driver on Windows By servingsolutions on Jan 28, 2013 in Blog, Phones, Support Blog Some Windows applications (ie Outlook, CRMs) have a click-to-dial feature. Sip tapi. SIPTAPI is a TAPI Service Provider (TSP) for MS Windows. SIPTAPI enables you to initiate phone calls from TAPI applications (like MS Outlook) via your SIP PBX or with common SIP VoIP phones. SIPTAPI enables you to initiate phone calls from TAPI applications (like MS Outlook) via your SIP PBX or with common SIP VoIP phones. A TAPI driver for SIP. SIPTAPI gives you a click2dial feature with any TAPI enabled application (e.g. MS Outlook) and SIP PBX/proxy. This is the 'free' version of SIPTAPI. There is also an enhanced commercial version available at www.ipcom.at.