The SIG Pro is a series of semi-automatic pistols designed and manufactured by Swiss Arms AG (formerly SIG Arms AG and Sauer & Sohn) and distributed in United States by the SIGARMS. It was the first polymer-framed handgun from either company. It is available in several variants (SP 2009, SP 2022 and SP 2340) and chambered in .40 S&W, 9 mm Parabellum and .357 SIG.