The locked breech design is very different and was pioneered by SIG Sauer. The SIG Sauer P220 is a refinement of the Petter-Browning design used in the SIG P210.

It was marketed initially by Browning as the Browning BDA. The P220 was the first SIG Sauer handgun sold in the US. Sauer & Sohn to develop and market a new handgun which became the P220. In 1975, SIG entered into an agreement with German gun manufacturer J.P. Schweizerische Industrie Gesellschaft ( SIG) is a Swiss company, now known as Swiss Arms.

The SIG Sauer P226 and its variants are in service with numerous law enforcement and military organizations worldwide. The P226 itself has spawned further sub-variants the P228 and P229 are both compact versions of the double stack P226 design, while the P224 is a subcompact variant. It has essentially the same basic design as the SIG Sauer P220, but is developed to use higher capacity, double stack magazines in place of the single stack magazines of the P220. This model is sold with a choice of four chambers to choose from: the 9×19mm Parabellum. The SIG Sauer P226 is a full-sized service pistol made by SIG Sauer. Mechanically locked, recoil operated ( DA/SA, DAK (double action Kellerman), or DAO), or SAOġ0-, 12-, 13-, or 15-round magazine (.40 S&W.

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Sig sauer serial numbers p226