Safety device preventing conversion to full automatic firing

Abstract

A firearm (10) adapted for blowback operation has a receiver incorporating a longitudinally reciprocatable bolt assembly (24) having an inertia firing pin (40) which is movable between retracted or recoil and battery positions in the receiver (14). A trigger (68), including a sear (72), is pivotally mounted in the receiver. A hammer (74) is pivotally mounted in the receiver in such a manner that movement of the bolt assembly from the battery position to the recoil position urges the hammer into a cocked position. The hammer includes a first sear abutment (82) to engage the sear on the trigger, a second sear abutment (84) and a stop abutment (86). A disconnector (76) is pivotally mounted on the trigger pin (70). The disconnector includes a hook sear abutment (88) on an intermediate portion which is adapted to engage the second sear abutment on the hammer when the trigger is in a depressed position. Should the disconnector or hook sear be removed from the firearm, the stop abutment on the hammer is adapted to engage an abutment surface (98) in bolt assembly during movement from the recoil position to the battery position for preventing the conversion of the firearm into a machine gun. Additional removal of the stop abutment from the hammer will not permit automatic operation since material (96,97) is provided in the bolt to prevent incorporation of a longer firing pin.