We're not going to lie, the Sigma isn't a great pistol. It's a cheap gun that gets the job done, but it has a trigger that sucks and a few other characteristics that make it less than desirable. Nevertheless, it's a popular choice for police departments around the world.
The Smith & Wesson Sigma, or SD series as it is now called, was created to compete against Glock's polymer pistols that were gaining popularity at the time. The Sigma has a double action only design with a stainless steel slide and polymer frame. The Sigma has an equipment rail for lights and can hold a 16 round magazine.
While the Sigma had a rocky start and earned a bad reputation, the pistol got better over the years. Now the Sigma can be purchased for under $400 brand new and is a good value. It's also an excellent backup or primary carry gun for law enforcement officers.
The SD9 can be had in multiple configurations including the barrel (a 4.6-inch standard or shorter 4.25-inch option), sights (optic height, steel white dots, or night sights), and colors (black-on-black, FDE, or two-tone black over stainless). It's also available with optics-ready options that accept seven different micro red dots via Smith's CORE system, which is pretty impressive for a gun this price range.
The trigger on a sigma is hard and long with some take-up. It can be improved by using the smith wesson sigma trigger spring kit, which replaces some internal levers and springs for a more comfortable feel. This will void the warranty on the weapon, but it's an easy at-home gunsmithing fix that can make a big difference in how well the Sigma shoots.
