The Walther P99 is a highly advanced semi-automatic pistol, originally designed with a focus on ergonomics, reliability, and safety. It features a short recoil-operated, locked-breech system that utilizes a modified Browning cam-lock mechanism. The P99's polymer frame and steel slide assembly make it both lightweight and durable. A key innovation of the P99 is its internal striker mechanism, replacing the traditional external hammer, and offering both visual and tactile indicators of the firearm's cocked status and loaded chamber. The pistol originally debuted with a Double-Action/Single-Action (DA/SA) trigger system with an Anti-Stress mode, which lengthens the initial trigger pull for added safety without compromising the crisp trigger break and short reset that follow. The P99 is equipped with interchangeable backstraps, adjustable iron sights, and an ambidextrous magazine release built into the trigger guard, which enhances its adaptability for various users. The firearm is treated with a Tenifer finish, providing exceptional resistance to corrosion and wear, making it ideal for concealed carry. The P99 AS (Anti-Stress) variant, introduced later, became especially popular for its refined trigger mechanism and user-friendly features, including a no-snag decocker and interchangeable backstraps. The final edition of the P99, known as the P99 AS Final Edition, features a classic OD Green frame with "Final Edition" engraving, signifying the end of this iconic model's production, while retaining all the hallmark features that made it a trusted choice for law enforcement and civilian use alike.