Patent ID: 6886284
Filing Date: 2005-05-03
Classification: B23K,F42B,G02B,H05K

Abstract:
1. A firearm, comprising: a gun barrel, a chamber coaxially extensive with the gun barrel for accommodating a round of ammunition including the chamber having a firing pin associated therewith that is activated by a trigger assembly to strike the primer and ignite the propellant and discharge the bullet from the firearm, and a unique identifying indica for imprinting a corresponding identifying mark on an exterior surface of the shell casing when the shell casing expands upon discharge of the round of ammunition by the firearm, wherein the identifying indicia is formed on a base surface located on a radially inner end of an indicia insert contained in a radial bore extending radially outwards from an inner surface of the chamber and normal to a longitudinal axis of the shell casing with the radially inner end of the indicia insert being located in proximity to an outer cylindrical surface of the shell casing in the chamber, wherein the base surface is recessed from the inner surface of the chamber in a radially outwards direction, and an exposed surface of the identifying indicia formed on the base surface of the radially inner end of the indicia insert forms a cylindrical surface coincident with and substantially flush with the inner surface of the chamber.