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The 9 mm, .40 S&W, .357 SIG and .380 ACP Smith & Wesson Sigma (later called the Smith & Wesson SD) debuted in 1994. It was S&W’s first polymer semi-auto pistol. It had used a short-recoil action. It also had the common characteristics of other similar striker-fired polymer guns: diagonal slide serrations in back, a good beavertail for excellent control, a high grip with finger grooves on either side, a proprietary accessory rail under the muzzle, a serrated face trigger guard, etc.

In fact, all this was so similar to certain Glock pistols that Glock sued for patent infringement. But the two companies managed to find a settlement, which included S&W making some changes to their product, and move past that.

You could get the Sigma (and later the SD) chambered in 9 mm, .40 S&W, .357 SIG and .380 ACP. Between sizes and other options including a ported version, green frame or black frame, stainless steel slide versus a black Melonite slide, etc. This brought the total to nearly 20 models or variants.

Some Sigma semi-autos (e.g. the variants ending in VE such as the SW40VE) had a passive loaded chamber indicator visible through a small opening the top of the slide/ejection port.

The Sigma had two primary sizes: full-size and compact. That said, there wasn’t a huge difference in size between the two because they shared the same frame. To wit, the full-size’s dimensions were 4.5” barrel, 7.75” overall length, 26 ounces for the S&W 40 mm and 9 mm guns. The guns were 1.3 wide” and 5.5” tall. In contrast, the compact gun’s dimensions were 4.0” barrel, 7.25” overall length and 24 ounces for the S&W 40 guns and 24.25 ounces for 9 mm guns. These were also 1.3 wide” and 5.5” tall.

The sights were classic 3-dot white sights. The rear sight was drift-adjustable. The grip had nice diamond-hatching texture that improved further in later years. The standard magazine fit flush within the magwell. While not all specifications are clear at this time, it seems the full size .40 S&W gun’s capacity was 15+1 while the full size 9 mm’s capacity is 17+1.

S&W did all this at a very competitive price when brand new, and they can be a really great deal now too! These guns were made by Smith & Wesson based in Springfield, Massachusetts.

Do you have a Smith & Wesson Sigma for sale? click here.


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Smith Wesson Sigma

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