The Sig Pro, put simply, is SIGARMS' first entry into the polymer-framed pistol world. Although the Sig Pro is considered a polymer-frame pistol, it doesn't feel like a polymer-frame pistol, such as its trigger feel and the fact that it is hammer-fired (as opposed to striker-fired like most polymer-frame pistols, with the HK USP being an exception). This gives consumers all the benefits of a polymer-frame pistol—reduced weight, increased durability, and better corrosion resistance—without taking away the benefits of the Sig Classics.
The following are the available calibers, dimensions, and weights of the five Sig Pro models that have been in production, also indicating the month and year of introduction:
SP 2009 (09/1999) | SPC 2009 | SP 2340 (07/1998) | SP 2022 (10/2003) | SPC 2022 |
|
Caliber |
9mm (9mmx19) | 9mm (9mmx19) | .40 Auto (.40 S&W) or .357 Sig | 9mm (9mmx19), .40 Auto (.40 S&W), or .357 Sig | 9mm (9mmx19) |
Length, overall |
187mm or 7.36 inches | 180mm or 7.07 inches | 187mm or 7.36 inches | 187mm or 7.36 inches | 180mm or 7.07 inches |
Height, overall |
144mm or 5.67 inches | 134mm or 5.28 inches | 144mm or 5.67 inches | 144mm or 5.67 inches | 134mm or 5.28 inches |
Width, overall |
35mm or 1.38 inches | 35mm or 1.38 inches | 35mm or 1.38 inches | 35mm or 1.38 inches | 35mm or 1.38 inches |
Barrel length |
98mm or 3.85 inches | 91mm or 3.58 inches | 98mm or 3.85 inches | 98mm or 3.85 inches | 91mm or 3.58 inches |
Sight radius |
150mm or 5.9 inches | 145mm or 5.7 inches | 150mm or 5.9 inches | 150mm or 5.9 inches | 145mm or 5.7 inches |
Weight w/o magazine |
715g or 25.2oz | 713g or 25.15oz | 765g or 27.0oz (.40 Auto); 775g or 27.3oz (.357 Sig) | 760g or 26.81oz (9mm); 790g or 27.87oz (.40 Auto); 790g or 27.87oz (.357 Sig) | 713g or 25.15oz |
Weight of empty magazine |
87g or 3.0oz | 87g or 3.0oz | 87g or 3.0oz | 87g or 3.0oz | 87g or 3.0oz |
All of the engineering that went into the Sig Classic pistols—the P220, P225, P226, P228, P229, P239, and P245—is apparent in the Sig Pro pistols. The main difference between the Sig Pro and Sig Classic pistols is the polymer frame in the former, and the alloy (or steel, in some cases) frame of the latter. The polymer frame allows the Sig Pro to be sold for less than the Sig Classic. The internal safeties and general mechanics are the same.
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