Product Evolution
The Walther P99 was modified several times throughout its production history, as were the magazines. When the P99 was introduced the magazine capacities were 16-rounds for 9x19mm Parabellum and 12-rounds for .40 S&W and the magazines had witness holes on both sides of the magazines. Later the magazine capacities were reduced to 15-rounds for 9x19mm Parabellum and 11-rounds for .40 S&W and witness holes at the rear of the magazine to view the loading condition were introduced.
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