| 摘要 |
In a rifle or handgun, identification grooves, which are shallower than the rifling grooves, are formed in a pattern unique to a particular gun, providing a means of identifying the gun through which a bullet was shot. This identification can be used by forensic labs to tie a fired bullet to a gun having a particular serial number, even if the gun is not available for examination. The data mechanically encoded preferably include redundant bits which provide error control coding, thereby making identification both easier and more certain. The pattern is preferably formed by a mechanically-invariant process (such as EDM or photoengraving).
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