Abstract: The present invention relates to the fire arm industry and more particularly to a system that impresses a bar type code into the lead bullet that has been fired from a gun. The identifying markings are placed on the gun barrel lands with as little visibility as possible but enough to form the code to identify the fired bullet as being from one specific handgun or rifle. The code markings may be placed on the barrel, without effecting its operation in any way. The microscopic identifying code markings are impressed in to the surface of the lands of the gun barrel and when the firearm is fired the force of the firing forms this particular gun's code on the bullet. These identifying code markings may be placed at the intersection of the chamber and the barrel so that when a bulletted cartridge is placed in the chamber and the gun is fired, the code marks are encoded on both the neck of the brass and the lead bullet surface, forming identical codes.

Abstract: The present invention relates to the fire arm industry and more particularly to a system that impresses a bar type code into the brass cartridge casing that has been fired from a gun. The identifying markings are placed on the gun with as little visibility as possible but enough to form the code to identify the fired casing as being from one specific handgun, rifle or shotgun. The code markings may be placed on the bolt, breech and/or the firing pin of any firearm without effecting its operation in any way. The identifying code markings are impressed on the surface of the shell casing when the firearm is fired. These identifying code marks may be placed at the outer rim surface, inside the primer area rim, on the primer its self or in multiple places on the shell casing. The identifying code markings are similar to bar code markings and directly relates the spent casing that has been fired by a firearm, to that firearm.