Smith & Wesson Sigma

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Smith & Wesson SIGMA
S&W SW9F
Type	Semi-automatic pistol
Place of origin	United States
Production history
Designer	Smith & Wesson
Designed	1993-1994
Manufacturer	Smith & Wesson
Variants	SW40F, SW9F, SW40C, SW9C, SW40V, SW9V, SW40E, SW9E, SW40VE, SW9VE, SW9P, SW9G, SW380M, SW9M
Specifications
Weight	740 g (SW40F, SW9F) 690 g (SW40C, SW40V, SW40VE, SW40E) 700 g (SW9C, SW9V, SW9VE, SW9E, SW9G, SW9P)
Length	197 mm (SW40F, SW9F) 184 mm (SW40C, SW40V, SW40VE, SW40E, SW9C, SW9V, SW9VE, SW9E, SW9G, SW9P)
Barrel length	114 mm (SW40F, SW9F) 102 mm (SW40C, SW40V, SW40VE, SW40E, SW9C, SW9V, SW9VE, SW9E, SW9G, SW9P)
Width	33 mm
Height	142 mm (SW40F, SW9F)

Cartridge	.40 S&W (SW40F, SW40C, SW40V, SW40VE, SW40E) 9x19mm Parabellum (SW9F, SW9C, SW9V, SW9VE, SW9E, SW9G, SW9P) .380 ACP (SW380M)
Action	Short recoil
Feed system	16-round box magazine (SW40F, SW9C, SW9V, SW9VE, SW9E, SW9G, SW9P) 17-round box magazine (SW9F) 15-round box magazine (SW40C, SW40V, SW40VE, SW40E)
Sights	Fixed 3-dot notch sights

The Sigma is Smith & Wesson's venture into using synthetic materials in gun construction, using high-strength polymer material for the frame.

Created in 1994, it also incorporates the currently-fashionable self-cocking or double-action only firing mechanism, so that the pistol can be fired without delay or preparation. The basic model is chambered for the .40 S&W cartridge, but it is also available in 9 x 19mm Parabellum and a sub-compact model in .380 ACP is also manufactured.

The Sigma series pistols are so similar to the competing Glock pistols that Glock sued Smith & Wesson for patent infringement. The case was settled out of court in 1997, with S&W agreeing to make alterations to the Sigma design and pay an undisclosed amount to Glock.[1]