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The Heckler & Koch VP9 (known as SFP9 in Europe and Canada) is a polymer-framed semi-automatic striker-fired handgun.The VP designation in the name refers to Volkspistole, which translates to "people's pistol" [4] while SFP stands for "striker-fired pistol". [5]
Image Model Variants HK4: P11: HK VP70 (Volkspistole 70) HK VP70M, HK VP70Z HK P9: HK P9S, HK P9K: HK P7: HK PSP, HK P7M8, HK P7M13, HK P7M10, HK P7K3, HK P7M7, HK P7PT8: HK USP (Universal Self-loading Pistol)
The HK P9 is a semi-automatic pistol from Heckler & Koch in 9×19mm Parabellum, .45 ACP, and 7.65×21mm Parabellum and the first to use a variation of H&K's roller delayed blowback system in a pistol format and polygonal rifling [1] now common in H&K designs.
It has a double-stack, double-feed magazine; double-feed magazines are uncommon for pistols even today. These magazines hold 18 rounds, a rather high capacity for its original production time. As on the Mauser C96 and the Lahti L35 , the stock was designed to be used as a holster when not mounted.
The HK91, HK93 and HK94 models were all on the import ban list. [1] At the time of the ban, about 130 or so HK91s had already been delivered to the U.S. but had not yet cleared customs. H&K complied with the ban by renaming those HK91s as HK911 (basically stamping another "1" after the name) and adding a Bell-Carlson thumbhole stock.
Using a similar recoil reduction system, the H&K Mk 23 pistol fired more than 30,000 high pressure (+P) cartridges and 6,000 proof loads without damage or excessive wear to any major components. Abuse and function-testing of USPs have seen more than 20,000 rounds of .40 S&W fired without a component failure.