Firearm signatures on a fired cartridge case include the firing pin

Topography measurements and applications in ballistics and tool

The Anatomy of Guns and of Ammunition

Firing pin impressions: a valuable feature for determining the orientation of the weapon at the time of shooting - ScienceDirect

PDF) Topography measurements and applications in ballistics and

PDF) Topography measurements and applications in ballistics and

image of breechface and image of firing pin with ring light

M2A1 Machine Gun features greater safety, heightened lethality, Article

Topographic Analysis of Firing Pin Impressions on Cartridge Cases, Science Lab

Cartridge (firearms), Public Safety Wiki

Elements of the Cartridge Case Head