English: Example of the firing pin impressions or Breechface and ejector marks that Drugfire can use to identify a bullet and the gun it was fired from.
(These were origionally four seprete imiages, I spliced them all togther and up-loaded them as a single Imiage. These imiages were origionally found at http://www.fbi.gov/hq/lab/fsc/backissu/april2000/schehl1.htm#Rifling)
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