
Glock Generations Decoded: Gen1 to Gen5 Changes That Matter
A clear, hands-on walk through Gen1 to Gen5 Glock differences you can actually see and feel, plus quick ID cues, useful markings, and a 10-minute inspection plan.
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The Heckler & Koch PSP (Polizei Selbstlade Pistole, or Police Self-Loading Pistol) is the original designation for what became the P7, the first variant produced in response to the West German police specifications developed after the 1972 Munich Olympics disaster. The PSP designation identifies the initial production and evaluation variant of the squeeze-cocking pistol before it was standardized as the P7 for commercial and broader law enforcement sale, making PSP-marked examples among the earliest and rarest production versions of this innovative design.
The PSP’s development was driven by the specific requirements that West German police authorities established following their analysis of the Munich incident, in which the available police weapons were judged inadequate for the tactical demands of the situation. These requirements specified that the new service pistol must be safe when carried loaded—passive safety adequate for holstered carry with a round chambered—must be instantly ready for one-handed firing without manual safety manipulation, and must provide reliable function with the broad range of 9mm ammunition that police procurement might involve.
The squeeze-cocking mechanism of the PSP/P7 addresses all of these requirements in an elegant unified design solution. The pistol is carried safely because the striker decocks automatically when grip pressure is released; it is instantly ready because closing the grip during the draw stroke cocks the striker; and it requires no manual safety manipulation at any point in the firing sequence. The gas-delay blowback operating system and fixed barrel contribute additional reliability and accuracy advantages.
PSP-marked examples are distinguished from subsequent P7 production by specific markings and certain detail differences in construction, making them the most collectible variants of the P7 family for the specialist collector. Their rarity and historical significance as the original expression of one of the most innovative service pistol designs ever produced make them prized acquisitions.
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A clear, hands-on walk through Gen1 to Gen5 Glock differences you can actually see and feel, plus quick ID cues, useful markings, and a 10-minute inspection plan.

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