CRIM 355 Chapter Notes - Chapter 6: Gun Barrel, Automatic Firearm, Infrared Photography
30 Mar 2020
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Document Summary
Handguns - firearms designed to be held & fired w/ one hand. Minute random markings on surfaces can impart individuality to inanimate objects. High frequency of shooting cases means science of firearms identification must extend beyond mere comparison of bullets to include knowledge of. Restoration & obliterated serial numbers on weapons. Detection & characterization gunpowder residues on garments & around wounds. All can be classified as single-action or double-action. Single action - require hammer to be manually cocked backward each time before trigger pulled in order to fire. Double action - cock hammer when trigger is pulled & reload firing chamber after round is fired. Revolver - features several firing chambers located w/i revolving cylinder. As revolver fired, cylinder can rotate clockwise/counterclockwise. Each firing chamber holds ones cartridge, which is lined up w/ barrel mechanically when round is fired. Semiautomatic pistols feature removable magazine most often contained w/i grip of firearm.
