The SIG P229 model semi-automatic pistol was developed from the existing P228 series but with police forces and security personnel in mind. As such, it was made for concealed-carry as it would most likely be quickly drawn from a holster positioned somewhere on the wearer's body. Chambering was in .40 S&W and a stainless-steel slide (CNC-milled) was used over the working components as well as the barrel. The sighting feature was of a high-contrast type for quick alignment to the target. The base version was offered with a Double-Action (DA) / Single-Action (SA) trigger unit and various other options found in other SIG models were eventually introduced for the P229. In time, .22LR, 9mm, and .357 S&W chamberings were supported. Service introduction was in the early 1990s.
The P229 went on to be adopted by the nations of Bangladesh, Canada, Germany, Greece, Pakistan, Sweden, Turkey, the United Kingdom and the United States - primarily in special forces and police/security circles. In service it has performed admirably well considering its discerning customers and rigorous roles the weapon has been placed in.