The Smith & Wesson 5906 is a semi-automatic pistol manufactured by Smith & Wesson starting in 1989. It is a full-sized, double/single action, 9mm pistol with a staggered-column magazine made entirely of stainless steel. This firearm is specifically designed to fire 9mm ammunition and has a magazine disconnect feature that automatically deactivates the trigger if the magazine is not fully inserted. It comes with either a 10 or 15-round magazine. It has ambidextrous safety levers, a one-piece rear wraparound grip, and a choice of either fixed sights or a rear sight that is fully adjustable for both windage and elevation. The 5906 is highly favored among law enforcement and military units in the United States.