The SIG P226 is a full-sized, service-type pistol made by SIG Sauer. It is chambered for the 9×19mm Parabellum, .40 S&W

.40 S&W

The .40 S&W is a rimless pistol cartridge developed jointly by major American firearms manufacturers Winchester and Smith & Wesson. The .40 S&W was developed from the ground up as a law enforcement cartridge designed to duplicate performance of the FBI's reduced velocity 10mm cartridge which could...

, .357 SIG

.357 SIG

The .357 SIG pistol cartridge is the product of Swiss-German firearms manufacturer SIG-Sauer, in cooperation with the American ammunition manufacturer Federal Cartridge. While it is based on a .40 S&W case necked down to accept bullets, the .357 SIG brass is slightly longer...

, and .22 Long Rifle

.22 Long Rifle

The .22 Long Rifle rimfire cartridge is a long established variety of ammunition, and in terms of units sold is still by far the most common in the world today. The cartridge is often referred to simply as .22 LR and various rifles, pistols, revolvers, and even some smoothbore shotguns have...

. It is essentially the same basic design of the SIG P220

SIG P220

The SIG P220 is a semi-automatic pistol designed in Switzerland by Swiss Arms AG . It is manufactured in Eckernförde, Germany, by J.P. Sauer und Sohn GmbH. It uses the Browning linkless cam short recoil action of self-loading with a double action trigger mechanism...

, but developed to use higher capacity, staggered-column magazines in place of the single-column magazines of the P220. The P226 itself has spawned further sub-variants; the P228 and P229 are both compact versions of the staggered-column P226 design.