CRIM 355 Chapter Notes - Chapter 8: Gun Barrel, Breechface, Sole Markings
18 Apr 2017
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Chapter 8: firearms, tool marks, and other impressions. Firearms identification: discipline mainly concerned with determining whether a bullet or cartridge was fired by a particular weapon. Not to be confused with ballistics (the study of a projectile in motion) Handguns/pistols = firearms that are designed to be held and fired with one hand. 3 common handguns: single-shot handguns: can only fire one round revolvers: several firing chambers semiautomatics: removable magazine that is often contained within the grip of the firearm (fires one shot per trigger pull) Single-action: require hammer to be manually cocked backward each time before the trigger is pulled in order to fire. Double-action: cock the hammer when the trigger is pulled and the reload the firing chamber after the round is fired. Long guns: rifles/shotguns (fires while resting on shoulder) The inner surface of the barrel of a gun leaves its markings on a bullet passing through it.
