Abstract: A unitary bolt face and firing pin device for firearms consisting of a self-adjusting head space block on the front of the bolt assembly facing the chamber in firing alignment with the primer of a cartridge inserted into said chamber, the face of said head space block having integrally formed thereon a firing pin for impacting with said cartridge primer when said bolt assembly is closed against said chamber.

Abstract: A chamber alignment and safety system for firearms consisting of longitudinally extending slide mechanism axially aligned with and pivotally connected to the barrel and bolt housing, said slide mechanism including means for moving said pivotal connections away from one another, whereby the breech may be opened to expose the chamber for loading ammunition therein and for unloading spent cartridges therefrom by separating and rotating the barrel relative to the bolt housing, and a safety device having a rack carried by the bolt assembly and a pinion gear secured in the bolt housing meshed with the rack for driving the bolt assembly into and away from firing alignment with the chamber, said safety device also having trip means connected to a trigger sear for locking and unlocking said sear in triggering position responsive to movement of said rack and gear.