the firing pin safety plunger, lifting it upward, and releasing the firing pin safety. At the rearward extreme of the trigger bar's travel, it engages the sear. The sear is rotated downward by the trigger bar, fully cocking, then releasing the striker. The striker makes contact with the primer of the chambered round, which in turn ignites the gunpowder and propels the bullet forward. According to M&P gunsmith Dan Burwell, the angle on the rear face of the sear creates a camming action against the striker. This camming action moves the striker to the rear very slightly during the trigger pull, thus finishing the "cocking". This system is similar to the partially tensioned striker found in the Glock series of pistols. When the pistol cycles for the next shot, the striker will be automatically pre-set in a 98% cocked position. Because the striker is only 98% cocked prior to the trigger being pulled, Smith & Wesson classifies the M&P's action as "striker fired (double action only)". The M&P factory trigger is of the jointed type and has a trigger travel of 7.6 mm (0.3 in) and is rated at . The M&P45c models have a slightly higher rated trigger pull of . The competition oriented M&P40 Pro Series have a reduced trigger pull of due to the installation of a Smith & Wesson performance center sear. Massachusetts approved models have a trigger pull of . The pistols are delivered with two magazines. The standard iron sights are of the three dot type and made of steel. Both the front and rear sights are dove-tailed into the slide, and can be horizontally drifted to adjust for windage correction. An integrated Picatinny rail can be found underneath the slide on the front of the frame for attaching tactical lights, lasers and other accessories. There are ten-round magazine versions of each pistol available for the California, Massachusetts, New York, Washington State, New Jersey, Australian, and Canadian markets. Novak tritium night sights are an available option for both the full-sized and compact versions. Another optional accessory is the stainless steel lanyard pin. The new pin replaces the original solid plastic pin with one that has a stainless steel ring embedded for use with a lanyard. Variants The M&P is available in 9×19mm Parabellum, .30 Super Carry, .380 ACP, .40 S&W, and .45 ACP, with barrel lengths of . The .357 SIG chambering has been