<P> As the slide of the pistol enters battery , the striker engages the sear . At this point , the sear is held back in a partially cocked condition . When the trigger of the M&P is pulled , the trigger bar first engages the firing pin safety plunger , lifting it upward , and releasing 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 renowned 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 ) '' . </P>
<P> As the slide of the pistol enters battery , the striker engages the sear . At this point , the sear is held back in a partially cocked condition . When the trigger of the M&P is pulled , the trigger bar first engages the firing pin safety plunger , lifting it upward , and releasing 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 renowned 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 ) '' . </P>
m & p shield 9mm single action or double
m & p shield 9mm single action or double
double action
double action